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

0,3

Comments

A136590 is the triangle of trinomial logarithmic coefficients.

Links

Table of n, a(n) for n=0..20.

Prog

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

Crossrefs

Cf. A136590, A136591, A136592, A136593.

Sequence in context: A155861 A212140 A357283 * A268502 A167826 A301995

Adjacent sequences: A136591 A136592 A136593 * A136595 A136596 A136597

Keyword

nonn

Author

Paul D. Hanna, Jan 10 2008

Status

approved