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A261421 Numerators of coefficients in Taylor series expansion of g.f. for Motzkin numbers A001006. 0
1, 1, 7, 25, 427, 1911, 18051, 87945, 3518515, 17943211, 185961113, 976288495, 20727407743, 111039591475, 1199227922235, 6520801221225, 570761912807235, 3139190488028595, 34696316039725725, 192564553799569875, 4291438629174301605, 23993043241870766505, 269139354637637831685 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..22.

EXAMPLE

The coefficients are [1, 1/2, 7/8, 25/16, 427/128, 1911/256, 18051/1024, 87945/2048, 3518515/32768, 17943211/65536, 185961113/262144, 976288495/524288, 20727407743/4194304,  111039591475/8388608, 1199227922235/33554432, 6520801221225/67108864,  ...

CROSSREFS

The denominators appear to be A046161. Cf. A001006.

Sequence in context: A198022 A231579 A197721 * A081298 A318633 A300527

Adjacent sequences:  A261418 A261419 A261420 * A261422 A261423 A261424

KEYWORD

sign,frac

AUTHOR

N. J. A. Sloane, Aug 27 2015

STATUS

approved

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Last modified July 8 08:08 EDT 2020. Contains 335520 sequences. (Running on oeis4.)