login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
A027305
a(n) = Sum_{k=0..floor((n+1)/2)} (k+1) *
A008315
(n, k).
0
1, 3, 5, 13, 24, 58, 111, 257, 500, 1126, 2210, 4882, 9632, 20980, 41531, 89497, 177564, 379438, 754014, 1600406, 3184016, 6720748, 13382710, 28117498, 56026984, 117254268, 233765636, 487589572, 972504704, 2022568168
(
list
;
graph
;
refs
;
listen
;
history
;
text
;
internal format
)
OFFSET
0,2
LINKS
Table of n, a(n) for n=0..29.
FORMULA
a(2n) =
A065982
(n+1)/2 = (n+2)*binomial(2n+2, n+1)/2 - 4^n.
CROSSREFS
Cf.
A065982
.
Sequence in context:
A026733
A005824
A336103
*
A026766
A026709
A219699
Adjacent sequences:
A027302
A027303
A027304
*
A027306
A027307
A027308
KEYWORD
nonn
AUTHOR
Clark Kimberling
STATUS
approved
