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Search: id:A147737
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A147737 Number of permutations of 1..n with all sums of 2 through 3 adjacent terms squared respectively unique. +0
1
1, 2, 6, 24, 120, 720, 4824, 34968, 300284, 2970424, 30732800, 363532816, 4539439318, 61773731104, 919276818482 (list; graph; listen)
OFFSET

1,2
CROSSREFS

Sequence in context: A147740 A147739 A147738 this_sequence A068201 A164873 A052399

Adjacent sequences: A147734 A147735 A147736 this_sequence A147738 A147739 A147740

KEYWORD

nonn

AUTHOR

Ron Hardin (rhhardin(AT)att.net) Nov 11 2008

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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.

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