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A136039 Bisection of A138551. 0
1, 2, 23, 684, 34760, 2493096, 228253267, 25091028820, 3179942075960, 451649016238160, 70421753109861592, 11869050034269797984, 2136758627313217104448 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..12.

CROSSREFS

Sequence in context: A073062 A015098 A269021 * A237580 A273976 A098633

Adjacent sequences:  A136036 A136037 A136038 * A136040 A136041 A136042

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Mar 25 2008

STATUS

approved

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Last modified July 30 19:33 EDT 2021. Contains 346359 sequences. (Running on oeis4.)