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A147743
Number of permutations of 2..n+1 with all sums of 2 through 4 adjacent terms squared respectively unique.
0
1, 2, 6, 24, 120, 720, 4608, 33952, 305092, 2822386, 31085630, 363851312, 4526935712, 61820980344
OFFSET
1,2
CROSSREFS
Sequence in context: A152351 A147745 A147744 * A152353 A152357 A152365
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 11 2008
STATUS
approved