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Search: id:A151629
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A151629 Number of permutations of 2 indistinguishable copies of 1..n with exactly 7 adjacent element pairs in decreasing order. +0
1
0, 232, 450048, 163809288, 27306899520, 2898916824320, 230479103253264 (list; graph; listen)
OFFSET

4,2

CROSSREFS

Sequence in context: A156391 A125850 A139673 this_sequence A132917 A139652 A126979

Adjacent sequences: A151626 A151627 A151628 this_sequence A151630 A151631 A151632

KEYWORD

nonn

AUTHOR

Ron Hardin (rhhardin(AT)att.net) May 29 2009

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.


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