333360

Appears in sequences

• a(n) = n! + (2*n-1)!/(n-1)!.at n=5A226730
• The number of permutations of {1,1,1,1,1,2,2,2,2,2,...,n,n,n,n,n} with the property that b(1) >= b(2) >= ... >= b(n), where five k's are skipped by b(k) for k=1..n.at n=8A332773
• Triangle read by rows: T(n, k) = n! * 3^k * hypergeom([-k], [-n], -1/3).at n=38A375446