196624domain: NAppears in sequencesa(0) = 19; for n>0, successively subtract 5, subtract 3 and double.at n=48A106706Binomial transform of A113127; (1, 1, 3, 7, 15, 31, ...) convolved with (1, 3, 7, 15, 31, 63, ...).at n=13A181527Number of nonisomorphic vertex-transitive tournaments of order 2n-1.at n=22A346179