122544domain: NAppears in sequencesNumber of symmetric trivalent maps with n nodes.at n=11A005028Positive numbers k such that k and 2*k are anagrams in base 7 (written in base 7).at n=15A023068a(0) = 1; a(n) = Sum_{1 <= k <= n and k|n} a(n-k).at n=24A067951Primitive elements of A096490.at n=37A118671