A180214 Number of permutations of 0..(n-1) representable as 1,3,3,1-weighted consecutive sums of 4 adjacent elements of a sequence of n+3 nonnegative integers.

1, 2, 2, 2, 2, 2, 4, 26, 38, 92, 186, 356, 938, 2682, 7032, 25282, 82022, 212058, 772436

Offset

1,2

Links

Table of n, a(n) for n=1..19.

Crossrefs

Sequence in context: A244460 A160419 A152659 * A329438 A263342 A089452

Adjacent sequences: A180211 A180212 A180213 * A180215 A180216 A180217

Keyword

nonn,more

Author

R. H. Hardin, Aug 15 2010

Status

approved