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A151589 Number of permutations of 2 indistinguishable copies of 1..n arranged in a circle with exactly 8 adjacent element pairs in decreasing order. 1
0, 5, 105372, 92123514, 25367820672, 3777055329267 (list; graph; refs; listen; history; text; internal format)
OFFSET
4,2
LINKS
Table of n, a(n) for n=4..9.
CROSSREFS
Sequence in context: A133381 A366270 A236066 * A243114 A038027 A237641
Adjacent sequences: A151586 A151587 A151588 * A151590 A151591 A151592
KEYWORD
nonn
AUTHOR
R. H. Hardin May 21 2009
STATUS
approved

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Last modified May 18 03:12 EDT 2024. Contains 372617 sequences. (Running on oeis4.)