125625

Appears in sequences

• Expansion of log(1+sinh(x)).at n=9A003704
• Expansion of e.g.f. arctan(sin(x)) (odd powers only).at n=4A012494
• Expansion of e.g.f. log(sech(x) + tanh(x)).at n=9A013208
• Triangle read by rows, matrix inverse of [x^(n-k)](skp(n,x)-skp(n,x-1)+x^n) where skp denotes the Swiss-Knife polynomials A153641.at n=36A214622
• Expansion of g.f. A(x) satisfying 1 = Sum_{n=-oo..+oo} x^n * (x^(3*n+1) - A(x))^n.at n=14A366229