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A217212 Number of sequences of 2's and 3's of length n with curling number 3. 2
0, 0, 2, 2, 4, 10, 20, 38, 82, 164, 328, 660, 1320, 2640, 5304, 10596, 21192, 42424, 84848, 169668, 339428, 678856, 1357712, 2715548, 5431096, 10862192, 21724746, 43449380, 86898760, 173798220, 347596440, 695192670 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..32.

CROSSREFS

Column 3 of A216955. Cf. A122536, A217211.

Sequence in context: A152732 A308986 A100088 * A025244 A132824 A298898

Adjacent sequences:  A217209 A217210 A217211 * A217213 A217214 A217215

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Oct 01 2012

STATUS

approved

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Last modified November 18 14:59 EST 2019. Contains 329262 sequences. (Running on oeis4.)