17146080

Appears in sequences

• Theta series of lattice A_2 tensor E_6 (dimension 12, det. 6561, min. norm 4).at n=19A033698
• Triangle read by rows: T(n,k) is the number of fixed-point-free involutions of {1,2,...,2n} having k cycles with entries of opposite parities (0 <= k <= n).at n=50A161119
• Triangle read by rows: T(n,k) is the number of fixed-point-free involutions of {1,2,...,2n} having k cycles with entries of the same parity (0 <= k <= 2*floor(n/2)).at n=45A161121
• The third power of the unsigned Lah triangular matrix A105278.at n=40A308281