A024426 a(n) = floor((1/n)*(S(n,1) + S(n,2) + ... + S(n,n))), where S(i,j) are Stirling numbers of second kind.

1, 1, 1, 3, 10, 33, 125, 517, 2349, 11597, 61688, 351133, 2126495, 13635665, 92197236, 655008884, 4874404106, 37893155897, 306986431845, 2586207911768, 22612848388416, 204850715383969, 1919652428481928, 18581619553950220

Offset

1,4

Links

Table of n, a(n) for n=1..24.

Crossrefs

Sequence in context: A302076 A149029 A149030 * A326558 A149031 A145928

Adjacent sequences: A024423 A024424 A024425 * A024427 A024428 A024429

Keyword

nonn

Author

Clark Kimberling

Extensions

a(6)-a(22) corrected and more terms from Sean A. Irvine, Jul 10 2019

Status

approved