-2504

Appears in sequences

• Expansion of e.g.f. arctan(exp(x) - sec(x)).at n=8A013331
• Triangle read by rows: E. F. Cornelius Jr. and Phill Schultz-based polynomials for the D_n Cartan Matrices in sequence A129862 that give a triangular sequence.at n=26A135185
• Array of coefficients of the minimal polynomial of (2*cos(Pi/15))^n, for n >= 1 (ascending powers).at n=21A307886
• Triangle T(n,k) read by rows, giving even-numbered coefficients of the matching polynomial of the n-ladder graph.at n=39A308244