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A026555 a(n)=T(n,n-2), T given by A026552. Also a(n) = number of integer strings s(0),...,s(n) counted by T, such that s(n)=2. 0
1, 2, 7, 13, 40, 76, 226, 434, 1279, 2470, 7267, 14085, 41462, 80584, 237484, 462620, 1365014, 2664276, 7870226, 15387670, 45501743, 89097932, 263707094, 517058502, 1531614109, 3006637946, 8912678569, 17514547015, 51952990090 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..29.

CROSSREFS

Sequence in context: A086904 A291276 A217305 * A262727 A129592 A153136

Adjacent sequences:  A026552 A026553 A026554 * A026556 A026557 A026558

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified August 11 06:25 EDT 2020. Contains 336422 sequences. (Running on oeis4.)