173712

Appears in sequences

• Numbers that can be expressed as the difference of the squares of primes in exactly ten distinct ways.at n=10A092006
• Triangle read by rows: T(n,k) is the number of k-matchings of the corona K'(n) of the complete graph K(n) and the complete graph K(1); in other words, K'(n) is the graph constructed from K(n) by adding for each vertex v a new vertex v' and the edge vv'.at n=71A100862
• Triangle read by rows: T(n,k) is the number of k-matchings of the corona K'(n) of the complete graph K(n) and the complete graph K(1); in other words, K'(n) is the graph constructed from K(n) by adding for each vertex v a new vertex v' and the edge vv'.at n=72A100862
• Number of ways to place n nonattacking composite pieces rook + rider[2,2] on an n X n chessboard.at n=9A189838
• Number of 2 X 2 matrices with all elements in {0,1,...,n} and nonnegative even determinant.at n=26A210371
• Irregular triangle read by rows: T(n,k) is the number of partitions of the vertex set of the labeled n-dimensional hypercube graph into k connected subsets, 1 <= k <= 2^n.at n=25A389983