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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 (list; graph; refs; listen; history; text; internal format)
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: A101696 A155861 A212140 * A268502 A167826 A301995

Adjacent sequences:  A136591 A136592 A136593 * A136595 A136596 A136597

KEYWORD

nonn

AUTHOR

Paul D. Hanna, Jan 10 2008

STATUS

approved

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Last modified May 6 15:28 EDT 2021. Contains 343586 sequences. (Running on oeis4.)