-13840

Appears in sequences

• Expansion of log(1+sinh(x)).at n=8A003704
• Expansion of e.g.f. log(1+sin(x)^2)/2 (even-indexed coefficients).at n=4A024293
• 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=28A214622