A151591 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A151591

Number of permutations of 3 indistinguishable copies of 1..n arranged in a circle with exactly 3 adjacent element pairs in decreasing order.

0, 2, 732, 22360, 386375, 5339202, 66391738, 781132256

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

LINKS

Table of n, a(n) for n=1..8.

CROSSREFS

Sequence in context: A072384 A109949 A375956 * A252986 A247080 A145124

Adjacent sequences: A151588 A151589 A151590 * A151592 A151593 A151594

KEYWORD

nonn

AUTHOR

R. H. Hardin May 21 2009

STATUS

approved