153472domain: NAppears in sequencesSymmetrical triangle sequence from polynomials: q(x,n)=(-1)^n*(Sum[(k + 1)^n*x^k/k, {k, 1, Infinity}] + Log[1 - x])*(x - 1)^n/x; p(x,n)=q(x,n)+x^n*q(1/x,n).at n=48A154989a(n) = coefficient of the sqrt(6) term in (1 + sqrt(2) + sqrt(3))^n.at n=10A188573