A027139 T(n,n+1) + T(n,n+2) + ... + T(n,2n), T given by A027113.

2, 7, 23, 72, 218, 648, 1907, 5581, 16290, 47502, 138521, 404183, 1180402, 3450899, 10099605, 29589780, 86781374, 254761882, 748580729, 2201465799, 6479301022, 19083705249, 56246157177, 165881453558, 489506759446

Offset

0,1

Links

Table of n, a(n) for n=0..24.

Crossrefs

Sequence in context: A076656 A085387 A147970 * A295136 A192906 A217664

Adjacent sequences: A027136 A027137 A027138 * A027140 A027141 A027142

Keyword

nonn

Author

Clark Kimberling

Status

approved