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A026540 T(n,n-3), T given by A026536. Also number of integer strings s(0),...,s(n), counted by T, such that s(n)=3. 0
1, 2, 6, 16, 36, 104, 215, 635, 1275, 3786, 7518, 22344, 44170, 131264, 259002, 769578, 1517418, 4508580, 8888495, 26412001, 52077234, 154773696, 305257251, 907432695, 1790353357, 5323519838, 10507386918, 31251588060 (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: A066641 A265106 A306332 * A128232 A099099 A074082

Adjacent sequences:  A026537 A026538 A026539 * A026541 A026542 A026543

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified April 20 22:22 EDT 2019. Contains 322310 sequences. (Running on oeis4.)