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A110181 Row sums of number triangle A110180. 1
1, 2, 3, 6, 15, 42, 131, 432, 1497, 5420, 20373, 79422, 319927, 1328764, 5677653, 24904584, 111961129, 515029020, 2421047613, 11616330342, 56829235095, 283211069352, 1436529522233, 7410596379456, 38852645340297 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..24.

FORMULA

a(n)=sum{k=0..n, sum{j=0..floor((n-k)/2), C(n-k, j)C(n-k-j, j)k^j}}.

CROSSREFS

Sequence in context: A115098 A036418 A120589 * A141351 A088793 A322197

Adjacent sequences:  A110178 A110179 A110180 * A110182 A110183 A110184

KEYWORD

easy,nonn

AUTHOR

Paul Barry, Jul 14 2005

STATUS

approved

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Last modified March 23 18:13 EDT 2019. Contains 321433 sequences. (Running on oeis4.)