73197domain: NAppears in sequencesa(1)=2; a(n) = the reversal of (a(n-1) * maxdigit(a(n-1))).at n=5A121059Expansion of f(-x) * psi(x^2) * phi(x^3) / f(-x^3)^3 in powers of x where phi(), psi(), f() are Ramanujan theta functions.at n=45A230256