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A027280
a(n) = Sum_{k=0..2n-3} T(n,k) * T(n,k+3), with T given by A026568.
0
26, 164, 1224, 7664, 51488, 326456, 2126376, 13574046, 87554326, 560845908, 3607790136, 23158545126, 148945375022, 957564479960, 6162874994108, 39672627184498, 255578754020002, 1647166273816172, 10622076015026288, 68529892093271816, 442357250742603624
(list; graph; refs; listen; history; text; internal format)
OFFSET
3,1
LINKS
Table of n, a(n) for n=3..23.
CROSSREFS
Sequence in context: A042314 A280213 A200874 * A006354 A249292 A279744
Adjacent sequences: A027277 A027278 A027279 * A027281 A027282 A027283
KEYWORD
nonn
AUTHOR
Clark Kimberling
EXTENSIONS
More terms from Sean A. Irvine, Oct 26 2019
STATUS
approved

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Last modified May 21 19:31 EDT 2026. Contains 395806 sequences.
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