A027204 a(n) = Sum_{k=0..n-3} T(n,k) * T(n,k+3), with T given by A026714.

1, 14, 114, 846, 5217, 33058, 185624, 1101526, 5929477, 34039034, 179226693, 1009890836, 5250600651, 29257284226, 150953226411, 835291570006, 4288969189506, 23626483356528, 120937293900189, 664239986729098, 3393075842573290

Offset

3,2

Links

Table of n, a(n) for n=3..23.

Maple

A027204 := proc(n)
    add( A026714(n, k)*A026714(n, k+3), k=0..n-3) ;
end proc:
seq(A027204(n), n=3..30) ; # R. J. Mathar, Oct 21 2019

Crossrefs

Sequence in context: A199196 A071573 A076429 * A200037 A026959 A026989

Adjacent sequences: A027201 A027202 A027203 * A027205 A027206 A027207

Keyword

nonn

Author

Clark Kimberling

Extensions

Name corrected by Sean A. Irvine, Oct 21 2019

More terms from Ray Chandler, Oct 22 2019

Status

approved