-1948domain: ZAppears in sequencesa(n) = 10^n - n^11.at n=2A024125Expansion of f(-x^6)^3 / (f(-x^4)^2 * psi(x)) in powers of x where phi(), f() are Ramanujan theta functions.at n=31A262152Expansion of Sum_{k>=1} (-1)^(k+1)*k*x^k/(1 - k*x^k).at n=21A308366