A027985 a(n) = Sum{T(n,k)*T(n,k+1)}, 0<=k<=2n-1, T given by A027960.

6, 35, 144, 564, 2186, 8468, 32856, 127729, 497454, 1940525, 7580656, 29651385, 116111194, 455138499, 1785707924, 7011933544, 27554583254, 108355491404, 426368213364, 1678704356644, 6613026412314, 26064305550054, 102777232982624

Offset

1,1

Links

Table of n, a(n) for n=1..23.

Crossrefs

Sequence in context: A089581 A132657 A161784 * A078799 A203288 A026957

Adjacent sequences: A027982 A027983 A027984 * A027986 A027987 A027988

Keyword

nonn

Author

Clark Kimberling

Status

approved