A027310 a(n) = Sum_{k=0..n} T(n,k) * T(n,k+2), with T given by A026323.

1, 10, 84, 691, 5625, 45891, 375627, 3087869, 25492266, 211320955, 1758522205, 14686149360, 123057387973, 1034283033735, 8717735547615, 73673259617948, 624130742851351, 5299391600814357, 45091368351899283, 384429112020570375

Offset

1,2

Links

Table of n, a(n) for n=1..20.

Crossrefs

Sequence in context: A092718 A090763 A016131 * A287826 A335647 A364416

Adjacent sequences: A027307 A027308 A027309 * A027311 A027312 A027313

Keyword

nonn

Author

Clark Kimberling

Extensions

More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Mar 23 2003

Title corrected by Sean A. Irvine, Oct 27 2019

Status

approved