1695106117domain: NAppears in sequencesNumber of labeled trees with n+1 nodes such that the degrees of all nodes, excluding the first node, are odd.at n=12A058014Number of labeled odd-degree trees with 2n+1 nodes.at n=6A143601Numerators of coefficients of odd powers of x in expansion of f(x) = x cos (x cos (x cos( ... .at n=6A309204