Numerators of coefficients in Taylor series expansion of sqrt( 1 + Sum_{k>=1} (k*(k+1)/2)*x^k ).

A261420

Numerators of coefficients in Taylor series expansion of sqrt( 1 + Sum_{k>=1} (k*(k+1)/2)*x^k ).

Terms

    a(0) =1a(1) =1a(2) =11a(3) =37a(4) =371a(5) =735a(6) =2463a(7) =4397a(8) =91075a(9) =280123a(10) =1437381a(11) =2529811a(12) =8602103a(13) =-3127477a(14) =52126151a(15) =605095485a(16) =34771603043a(17) =53033530323a(18) =-118339970967a(19) =-925189527433

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