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A151656 Number of permutations of 7 indistinguishable copies of 1..n with exactly 2 adjacent element pairs in decreasing order. 0
0, 441, 35623, 1561238, 59287158, 2165511047 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

CROSSREFS

Sequence in context: A014793 A206467 A189278 * A110996 A013769 A013899

Adjacent sequences:  A151653 A151654 A151655 * A151657 A151658 A151659

KEYWORD

nonn

AUTHOR

R. H. Hardin (rhhardin(AT)att.net) May 29 2009

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Last modified February 14 23:53 EST 2012. Contains 205689 sequences.