20908800

Appears in sequences

• Number of spanning trees in K_3 X P_n.at n=5A003690
• Number of perfect matchings (or domino tilings) in K_4 X P_n.at n=10A003769
• Area of n-th triple of squares around a triangle.at n=11A005386
• Number of reduced words of length n in Coxeter group on 12 generators S_i with relations (S_i)^2 = (S_i S_j)^4 = I.at n=7A163055
• Number A(n,k) of spanning trees in C_k X P_n; square array A(n,k), n>=1, k>=1, read by antidiagonals.at n=33A173958