A027132 a(n) = diagonal sum of right justified array T given by A027113.

1, 2, 4, 12, 27, 70, 182, 477, 1269, 3413, 9249, 25255, 69389, 191680, 532026, 1482926, 4148949, 11647260, 32797042, 92608175, 262157690, 743845685, 2115093984, 6026041793, 17199956143, 49176678286, 140824260498, 403865784020

Offset

0,2

Links

Table of n, a(n) for n=0..27.

Crossrefs

Sequence in context: A291406 A219752 A242536 * A148172 A148173 A148174

Adjacent sequences: A027129 A027130 A027131 * A027133 A027134 A027135

Keyword

nonn

Author

Clark Kimberling

Status

approved