2998656

Appears in sequences

• From least significant term in expansion of E( tr (X'*X)^n ), X rectangular and Gaussian. Also number of types of sequential n-swap moves for traveling salesman problem.at n=8A001171
• Number of 3 X 3 magilatin squares with positive values < n.at n=25A173548
• Triangle read by rows: T(n,k) (n >= 0, 1 <= k <= n+1) are the signed Hultman numbers.at n=36A189507