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A110137 Diagonal sums of A110135 when read as a number triangle. 1
1, 2, 7, 22, 79, 286, 1071, 4070, 15721, 61506, 243703, 977366, 3968169, 16313842, 67942539, 286769518, 1227194947, 5326324598, 23451408843, 104753097326, 474663076539, 2181355670806, 10163422480887, 47988508807190 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
FORMULA
a(n)=sum{j=0..floor((n-2k)/2), C(n-2k, j)C(2(n-2k-j), n-2k)k^j}
CROSSREFS
Sequence in context: A176612 A132838 A047095 * A097967 A360861 A052879
KEYWORD
easy,nonn
AUTHOR
Paul Barry, Jul 13 2005
STATUS
approved

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Last modified February 21 12:33 EST 2024. Contains 370235 sequences. (Running on oeis4.)