A217931 - OEIS

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A217931

Number of sequences of n 2's and 3's with curling number 2 and which have the form XY^2 where Y has length 1 (so Y is 2 or 3).

1

0, 2, 2, 4, 8, 16, 32, 64, 126, 252, 504, 1004, 2008, 4016, 8024, 16048, 32096, 64178, 128356, 256712, 513392, 1026784, 2053568, 4107076, 8214152, 16428304, 32856482, 65712964, 131425928, 262851612, 525703224, 1051406448, 2102812394, 4205624788, 8411249576, 16822498162

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OFFSET

1,2

COMMENTS

This is twice A217832, the latter being the main entry for this sequence.

LINKS

Table of n, a(n) for n=1..36.

Index entries for sequences related to curling numbers

CROSSREFS

Sequence in context: A189914 A286496 A318187 * A090129 A001137 A123593

Adjacent sequences: A217928 A217929 A217930 * A217932 A217933 A217934

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Oct 15 2012

STATUS

approved