120909

Appears in sequences

• Number of free poly-IH10-tiles (holes allowed) with n cells.at n=9A197549
• Triangle T(n,k) read by rows: coefficients of polynomials P_n(t) defined in Formula section.at n=54A287040
• a(n) is the number of size n affine closed terms of variable size 0.at n=9A287045