A027204 - OEIS

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A027204

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

1

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

(list; graph; refs; listen; history; text; internal format)

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