A110579 {a(3,n)}, where a(m,n) is as defined in sequence A110576.

1, 4, 11, 29, 87, 317, 1367, 6644, 35257, 201152, 1224225, 7906794, 53961576, 387673853, 2921972174, 23036161619, 189459483913, 1621711095618, 14416893342727, 132860397599808, 1267097654903284

Offset

0,2

Links

G. C. Greubel, Table of n, a(n) for n = 0..570

Mathematica

a[0, 0] := 1; a[0, 1] := 1; a[0, n_] := a[0, n] = Sum[Binomial[2*n - k - 3, n - 2]*a[0, k], {k, 0, n - 1}]; a[1, 0] := 1; a[1, n_] := a[1, n] = a[1, n - 1] + a[0, n]; a[2, 0] := 1; a[2, n_] := a[2, n] = a[2, n - 1] + a[1, n]; a[3, 0] := 1; a[3, n_] := a[3, n] = a[3, n - 1] + a[2, n];
Table[a[3, n], {n, 0, 50}] (* G. C. Greubel, Sep 01 2017 *)

Crossrefs

Cf. A110576, A110577, A110578, A110580.

Sequence in context: A124861 A369844 A351438 * A361218 A024829 A296290

Adjacent sequences: A110576 A110577 A110578 * A110580 A110581 A110582

Keyword

easy,nonn

Author

Leroy Quet, Jul 28 2005

Extensions

More terms from Ryan Propper, Sep 25 2005

Status

approved