1242720

Appears in sequences

• Triangle T, read by rows, where g.f. of row n of T^n = (y + n*(n+1))^n for n>=0 and T^n denotes the n-th matrix power of T.at n=15A132875
• Column 0 of triangle A132875.at n=5A132877
• The polygonal polynomials evaluated at x = -1/2 and normalized with (-2)^n.at n=20A360605