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A110578 {a(2,n)}, where a(m,n) is as defined in sequence A110576. 5
1, 3, 7, 18, 58, 230, 1050, 5277, 28613, 165895, 1023073, 6682569, 46054782, 333712277, 2534298321, 20114189445, 166423322294, 1432251611705, 12795182247109, 118443504257081, 1134237257303476, 11219647646806519 (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]; Table[a[2, n], {n, 0, 50}] (* G. C. Greubel, Sep 01 2017 *)

CROSSREFS

Cf. A110576, A110577, A110579, A110580.

Sequence in context: A276906 A062416 A259885 * A134045 A079898 A173449

Adjacent sequences:  A110575 A110576 A110577 * A110579 A110580 A110581

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 30 10:09 EDT 2020. Contains 333125 sequences. (Running on oeis4.)