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A027252
a(n) = Sum_{k=0..n} (k+1) *
A026780
(n, n-k).
0
1, 3, 10, 28, 80, 211, 569, 1455, 3806, 9564, 24565, 61080, 155041, 382920, 964163, 2370712, 5934974, 14548685, 36266755, 88711181, 220415107, 538305745, 1334040167, 3254193849, 8047710361, 19613210297, 48419611161
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OFFSET
0,2
LINKS
Table of n, a(n) for n=0..26.
CROSSREFS
Sequence in context:
A350551
A191797
A355356
*
A104574
A307063
A239885
Adjacent sequences:
A027249
A027250
A027251
*
A027253
A027254
A027255
KEYWORD
nonn
AUTHOR
Clark Kimberling
STATUS
approved
