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Search: id:A147927
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A147927 Number of permutations of floor(i*6/5), i=0..n-1, with all sums of two and three adjacent terms respectively unique. +0
1
1, 2, 6, 16, 54, 260, 1236, 6360, 34730, 192782, 1393166, 9882056, 75731318, 596396100, 4939024062, 49565770888 (list; graph; listen)
OFFSET

1,2

CROSSREFS

Sequence in context: A147888 A147945 A147936 this_sequence A147919 A150029 A068787

Adjacent sequences: A147924 A147925 A147926 this_sequence A147928 A147929 A147930

KEYWORD

nonn

AUTHOR

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

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Last modified November 27 14:50 EST 2009. Contains 167570 sequences.


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