A136594 Unsigned row sums of triangle A136590.

1, 1, 2, 8, 26, 70, 820, 5152, 20316, 388712, 3666188, 17298908, 501805832, 6256792412, 33844737292, 1353617016078, 20960708128068, 137741948419428, 6588092586831028, 121860622573650906, 924837580461274556

Offset: 0

Author

Paul D. Hanna, Jan 10 2008

Keywords

• nonn

Comments

A136590 is the triangle of trinomial logarithmic coefficients.

Crossrefs

Cf. A136590, A136591, A136592, A136593.

Programs

PARI

a(n)=sum(k=0,n,n!/k!*abs(polcoeff(log(1+x+x^2 +x*O(x^n))^k,n)))