58730

Appears in sequences

• Expansion of 1/((1+x)*(1-x)^5).at n=38A001752
• a(n) = n*(n + 1)*(2*n^2 + 2*n - 1)/6.at n=19A006324
• Number of n X n 0..3 matrices with each 2 X 2 subblock idempotent.at n=12A224660
• Number A(n,k) of unimodal functions f:[n]->[k*n]; square array A(n,k), n>=0, k>=0, read by antidiagonals.at n=49A226031
• A255460(2^n-1).at n=8A255461
• a(n) is the number of permutations of length n that avoid the pattern 321 and the mesh pattern (12, 307) or the same sequence for the mesh pattern (12, 409).at n=11A289613