-2266domain: ZAppears in sequencesA coefficients of characteristic polynomials of binomial modulo two matrices times their doubled transposes: t(n,m,d)=If[ m <= n, Mod[Binomial[n, m], 2], 0]; M(d)=*Transpose[t(n,m,d)].t(n,m,d).Transpose[t(n,m,d)].at n=48A158200Expansion of Product_{k>=1} (1 - k*x^k) / (1 + x^k).at n=25A269339