There are three kind of tile. One is of size 1. Second is of size 2 of green color. Third is of size 2 with blue color.
These are the values I found but I can not figure out the formula. P1 1 p2 3 p3 5 p4 9 p5 21
2026-04-05 01:13:05.1775351585
Recurrence to find P(n). P(n) is the number of ways to decorate a strip of size n with tiles.
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The recurrence can be expressed as: $$P(n)=P(n-1)+2*P(n-2)$$