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A151637 Number of permutations of 3 indistinguishable copies of 1..n with exactly 7 adjacent element pairs in decreasing order. +0
1
0, 6750, 40241088, 40396577931, 18096792917796, 5183615502649800 (list; graph; listen)
OFFSET

3,2

CROSSREFS

Sequence in context: A035905 A049507 A064160 this_sequence A031986 A031832 A121106

Adjacent sequences: A151634 A151635 A151636 this_sequence A151638 A151639 A151640

KEYWORD

nonn

AUTHOR

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

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.


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