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A026993
a(n) = Sum_{k=0..n-2} T(n,k) * T(n,k+2), with T given by A026692.
0
1, 6, 32, 180, 984, 4606, 22689, 114992, 567129, 2576582, 12586319, 63131004, 305635176, 1384074886, 6739962365, 33708050180, 162468169385, 737652413014, 3588021213950, 17917172173846, 86273708463456, 393163075111278, 1911781914938634, 9536792007640980, 45924386118166540
(list; graph; refs; listen; history; text; internal format)
OFFSET
2,2
LINKS
Table of n, a(n) for n=2..26.
CROSSREFS
Cf. A026692.
Sequence in context: A000558 A047763 A259621 * A238115 A228959 A302734
Adjacent sequences: A026990 A026991 A026992 * A026994 A026995 A026996
KEYWORD
nonn
AUTHOR
Clark Kimberling
EXTENSIONS
More terms from Sean A. Irvine, Oct 21 2019
STATUS
approved

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Last modified October 5 04:48 EDT 2024. Contains 376530 sequences.
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