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Search: id:A147921
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A147921 Number of permutations of floor(i*7/5), i=0..n-1, with all sums of two adjacent terms unique. +0
1
1, 2, 6, 24, 74, 372, 2116, 13376, 91944, 651888, 5780164, 51776784, 517517604, 5477813312, 59576133472, 755631632616 (list; graph; listen)
OFFSET

1,2

CROSSREFS

Sequence in context: A147947 A147938 A147929 this_sequence A002526 A117665 A068777

Adjacent sequences: A147918 A147919 A147920 this_sequence A147922 A147923 A147924

KEYWORD

nonn

AUTHOR

Ron Hardin (rhhardin(AT)att.net) Nov 17 2008

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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