1835001domain: NAppears in sequencesNumber of Hamiltonian cycles in the directed graph with 2n nodes {0..2n-1} and edges from each i to 2i (mod 2n) and to 2i+1 (mod 2n).at n=26A027362Half the number of length n integer sequences with sum zero and sum of squares 512.at n=5A157548Partial sums of A162396.at n=35A164120