A147736 Number of permutations of 1..n with all sums of 2 through 2 adjacent terms squared respectively unique.

1, 2, 6, 24, 120, 720, 5040, 37440, 323520, 3312000, 34368480, 409907904, 5169149280, 71094545192, 1074493719384

Offset

1,2

Links

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

Crossrefs

Sequence in context: A152384 A152371 A152386 * A147741 A152379 A152377

Adjacent sequences: A147733 A147734 A147735 * A147737 A147738 A147739

Keyword

nonn

Author

R. H. Hardin, Nov 11 2008

Status

approved