-6389domain: ZAppears in sequencesExponential reversion of Euler totient function A000010.at n=7A050392Coefficients in the power series expansion of A(x) = Sum_{n=-oo..+oo} n*(n+1)*(n+2)/6 * x^(3*n) * (1 - x^n)^(n-2).at n=51A357156