31963680domain: NAppears in sequencesFourier coefficients of Eisenstein series of degree 2 and weight 4: a(n) = coefficient of the matrix [n, 0; 0, 1] with determinant n.at n=15A323991Sequence lists numbers k > 1 such that k^3 == phi(k) (mod sigma(k)), where phi = A000010 and sigma = A000203.at n=24A324215