A027129 a(n) = T(n,n) + T(n,n+1) + ... + T(n,2n), T given by A027113.

1, 3, 9, 27, 79, 231, 672, 1951, 5662, 16439, 47776, 139025, 405110, 1182107, 3454035, 10105373, 29600389, 86800887, 254797772, 748646741, 2201587214, 6479524339, 19084115993, 56246912653, 165882843095, 489509315203

Offset

0,2

Links

Table of n, a(n) for n=0..25.

Crossrefs

Sequence in context: A238440 A269578 A026289 * A077844 A077827 A299108

Adjacent sequences: A027126 A027127 A027128 * A027130 A027131 A027132

Keyword

nonn

Author

Clark Kimberling

Status

approved