An arithmetic progression has a general term $$a_n=a+d\cdot n.$$
Working with a larger problem I arrived to an expression
$$a_n=a+d\cdot n(n+1),\quad n=0,1, ...$$
with $a, d \in \mathbb{R}.$
Can you please help me with the terminology - what is the name of this kind of sequence?
2026-03-26 11:17:32.1774523852
Name to a progression with the general term $a_n=a+d\cdot n(n+1)$
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