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A136594 Unsigned row sums of triangle A136590. 4


%S 1,1,2,8,26,70,820,5152,20316,388712,3666188,17298908,501805832,

%T 6256792412,33844737292,1353617016078,20960708128068,137741948419428,

%U 6588092586831028,121860622573650906,924837580461274556

%N Unsigned row sums of triangle A136590.

%C A136590 is the triangle of trinomial logarithmic coefficients.

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

%Y Cf. A136590, A136591, A136592, A136593.

%K nonn

%O 0,3

%A _Paul D. Hanna_, Jan 10 2008

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Last modified June 13 18:45 EDT 2021. Contains 345008 sequences. (Running on oeis4.)