35515domain: NAppears in sequencesNumber of distinct Abelian subgroups of the symmetric group S_n.at n=7A062297Numbers k such that k and k^2 use only the digits 1, 2, 3, 5 and 6.at n=56A136974Expansion of 1 / ((1-x)^2 - x^4)^2.at n=16A392552