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A027278
a(n) = Sum_{k=0..2n-1} T(n,k) * T(n,k+1), with T given by A026568.
0
2, 8, 60, 312, 2030, 11752, 74174, 450292, 2829898, 17572000, 110733420, 695885000, 4403631638, 27874477216, 177101756296, 1126506215424, 7182056699722, 45847087891480, 293141734241436, 1876495434801400, 12026885684352138, 77161051350902456, 495534832203481122
(list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
Table of n, a(n) for n=1..23.
CROSSREFS
Sequence in context: A197941 A295502 A196076 * A001415 A305730 A364077
Adjacent sequences: A027275 A027276 A027277 * A027279 A027280 A027281
KEYWORD
nonn
AUTHOR
Clark Kimberling
EXTENSIONS
More terms from Sean A. Irvine, Oct 26 2019
STATUS
approved

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Last modified September 28 16:24 EDT 2024. Contains 376297 sequences.
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