A147737 Number of permutations of 1..n with all sums of 2 through 3 adjacent terms squared respectively unique.

1, 2, 6, 24, 120, 720, 4824, 34968, 300284, 2970424, 30732800, 363532816, 4539439318, 61773731104, 919276818482

Offset

1,2

Links

Table of n, a(n) for n=1..15.

Crossrefs

Sequence in context: A147740 A147739 A147738 * A177539 A177546 A177544

Adjacent sequences: A147734 A147735 A147736 * A147738 A147739 A147740

Keyword

nonn

Author

R. H. Hardin, Nov 11 2008

Status

approved