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A026537 a(n)=T(n,n), T given by A026536. Also a(n) = number of integer strings s(0),...,s(n), counted by T, such that s(n)=0. 1
1, 0, 2, 2, 8, 12, 38, 66, 196, 360, 1052, 1980, 5774, 11004, 32146, 61726, 180772, 348912, 1024256, 1984608, 5837908, 11346280, 33433996, 65143716, 192239854, 375351288, 1109049320, 2169299288, 6416509142, 12569973108 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..29.

CROSSREFS

Equals 2 * A026521(n-1).

Sequence in context: A302118 A014236 A087955 * A089248 A006663 A094941

Adjacent sequences:  A026534 A026535 A026536 * A026538 A026539 A026540

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified January 25 07:47 EST 2020. Contains 331241 sequences. (Running on oeis4.)