List questions from binomial-coefficients

Published on 29 Mar 2026 - 15:03

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binomial identities

Published on 29 Nov 2019 - 13:25

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Identity about binomial coefficients

Published on 29 Nov 2019 - 18:15

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Finding a tighter lower bound on ${n^2}\choose{n}$

Published on 30 Mar 2026 - 20:52

88

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Sum of products of binomial coefficients: $\sum\limits_{k=0}^{19}\binom{18}k\binom{20}k$

Published on 01 Dec 2019 - 4:43

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What's the coefficent of $x^{20}$ in $(x^3+x^4+x^5+...)^5$? Only hint is needed.

Published on 25 Mar 2026 - 9:29

31

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Make sense of an equation of inverse binomials

Published on 01 Dec 2019 - 15:28

54

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Identity on Theory of Numbers

Published on 02 Dec 2019 - 8:08

28

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How can I prove this equation is correct?

Published on 02 Dec 2019 - 18:22

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how can i prove this equation of binomial coefficients?

Published on 02 Dec 2019 - 18:48

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Can a binominal (or multinomial) coefficient be computed efficiently?

Published on 25 Mar 2026 - 19:17

442

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Binomial coefficient identity ${n \choose 2} + n = {n + 1 \choose 2}$

Published on 03 Dec 2019 - 6:22

175

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How much faster and how good is it to use this approximation for $\binom{n}{k}$ when $n \gg k$?

Published on 30 Mar 2026 - 9:55

128

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${2n \choose 1} + {2n \choose 3} + ... {2n \choose 2n-1}$

Published on 29 Mar 2026 - 16:20

59

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Binomial coefficients sum problem

Published on 07 Dec 2019 - 6:10

List Question

why multiplying the two series together give this as the coefficient of x^r?

binomial identities

Identity about binomial coefficients

Finding a tighter lower bound on ${n^2}\choose{n}$

Sum of products of binomial coefficients: $\sum\limits_{k=0}^{19}\binom{18}k\binom{20}k$

What's the coefficent of $x^{20}$ in $(x^3+x^4+x^5+...)^5$? Only hint is needed.

Make sense of an equation of inverse binomials

Identity on Theory of Numbers

How can I prove this equation is correct?

how can i prove this equation of binomial coefficients?

Can a binominal (or multinomial) coefficient be computed efficiently?

Binomial coefficient identity ${n \choose 2} + n = {n + 1 \choose 2}$

How much faster and how good is it to use this approximation for $\binom{n}{k}$ when $n \gg k$?

${2n \choose 1} + {2n \choose 3} + ... {2n \choose 2n-1}$

Binomial coefficients sum problem

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