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A136280 Twice A136279. 3
0, 0, 2, 24, 86, 326, 16848, 1165538, 80584148 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Another version of A136279 (appropriate since each 2-cycle has two members).

LINKS

Table of n, a(n) for n=1..9.

CROSSREFS

Sequence in context: A119060 A119050 A119068 * A123831 A138648 A172225

Adjacent sequences:  A136277 A136278 A136279 * A136281 A136282 A136283

KEYWORD

nonn

AUTHOR

Don Knuth, Mar 26 2008

STATUS

approved

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Last modified August 8 11:31 EDT 2020. Contains 336298 sequences. (Running on oeis4.)