-2055domain: ZAppears in sequencesFirst term in the continued fraction expansion of StieltjesGamma[n].at n=56A066035Expansion of (1-x)^(-1)/(1+2*x^2+x^3).at n=20A077894Triangle read by rows: Coefficients of characteristic polynomials of lower triangular matrix of Catalan numbers.at n=36A101413