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A026556 a(n)=T(n,n-3), T given by A026552. Also a(n) = number of integer strings s(0),...,s(n) counted by T, such that s(n)=3. 0
1, 3, 8, 24, 52, 156, 319, 954, 1910, 5696, 11304, 33648, 66514, 197778, 390266, 1159844, 2286996, 6795576, 13397075, 39809076, 78489235, 233262931, 460030947, 1367463642, 2697786052, 8021305890, 15830906756, 47082494816 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,2

LINKS

Table of n, a(n) for n=3..30.

CROSSREFS

Sequence in context: A081990 A084920 A323278 * A096001 A080097 A096886

Adjacent sequences:  A026553 A026554 A026555 * A026557 A026558 A026559

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified September 24 17:09 EDT 2020. Contains 337321 sequences. (Running on oeis4.)