97272

Appears in sequences

• Main diagonal of symmetric square array A100936.at n=7A100937
• Triangle T(n,k) = total of number at last index for all set partitions of n into k parts.at n=50A120095
• Number of edges in a regular 2n-gon when all vertices are connect by straight lines except for the n lines joining diametrically opposite vertices.at n=17A368815
• a(n) = Sum_{k=0..floor(n/2)} binomial(n,k) * binomial(n+k-1,n-2*k).at n=10A389325