login
A136594
Unsigned row sums of triangle A136590.
4
1, 1, 2, 8, 26, 70, 820, 5152, 20316, 388712, 3666188, 17298908, 501805832, 6256792412, 33844737292, 1353617016078, 20960708128068, 137741948419428, 6588092586831028, 121860622573650906, 924837580461274556
OFFSET
0,3
COMMENTS
A136590 is the triangle of trinomial logarithmic coefficients.
PROG
(PARI) a(n)=sum(k=0, n, n!/k!*abs(polcoeff(log(1+x+x^2 +x*O(x^n))^k, n)))
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Jan 10 2008
STATUS
approved