173745

Appears in sequences

• Second subdiagonal of triangle A027477, constructed from the Stirling numbers of the first kind.at n=8A027481
• Triangle T(n,k) of k-block ordered bicoverings of an unlabeled n-set, n >= 2, k = 3..n+floor(n/2).at n=30A060092
• Number of 6-block ordered bicoverings of an unlabeled n-set.at n=8A060094
• Square array read by antidiagonals downwards: super Patalan numbers of order 3.at n=49A248324
• G.f. A(x) satisfies: A(x - 3*x^3) = 1/(1 - 3*x).at n=9A276368