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A110580 {a(4,n)}, where a(m,n) is as defined in sequence A110576. 5
1, 5, 16, 45, 132, 449, 1816, 8460, 43717, 244869, 1469094, 9375888, 63337464, 451011317, 3372983491, 26409145110, 215868629023, 1837579724641, 16254473067368, 149114870667176, 1416212525570460, 13902957827280263 (list; graph; refs; listen; history; text; internal format)
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]; a[4, 0] := 1; a[4, n_] := a[4, n] = a[4, n - 1] + a[3, n]; Table[a[4, n], {n, 0, 50}] (* G. C. Greubel, Sep 01 2017 *)

CROSSREFS

Cf. A110576, A110577, A110578, A110579.

Sequence in context: A004146 A275126 A071101 * A055552 A086750 A086749

Adjacent sequences:  A110577 A110578 A110579 * A110581 A110582 A110583

KEYWORD

easy,nonn

AUTHOR

Leroy Quet, Jul 28 2005

EXTENSIONS

More terms from Ryan Propper, Sep 25 2005

STATUS

approved

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Last modified March 28 17:51 EDT 2020. Contains 333103 sequences. (Running on oeis4.)