A027324 a(n) = Sum_{k=0..n-1} T(n,k) * T(n,k+2), with T given by A026120.

3, 24, 184, 1463, 11657, 93688, 757850, 6169613, 50514395, 415759614, 3438158946, 28554806794, 238086163616, 1992242104601, 16725195766745, 140833011881526, 1189153456427116, 10066508646963539, 85417056346549467, 726375065671501914, 6189580339717996008

Offset

2,1

Links

Table of n, a(n) for n=2..22.

Crossrefs

Sequence in context: A144087 A110347 A213100 * A122741 A136325 A194888

Adjacent sequences: A027321 A027322 A027323 * A027325 A027326 A027327

Keyword

nonn

Author

Clark Kimberling

Extensions

More terms from Sean A. Irvine, Oct 27 2019

Status

approved