291745domain: NAppears in sequencesSum of the digits of the n-th Mersenne prime (A000668).at n=30A066538a(n) = (2*n - 1)*(24*n^2 - 42*n + 19).at n=18A160174The function W_n(6) (see Borwein et al. reference for definition).at n=36A169711