67235domain: NAppears in sequencesNumber of unrooted triangulations with reflection symmetry of a pentagon with n internal nodes.at n=10A005506a(n) = (n/2)*(n + 1)*(3*n + 11).at n=33A059997a(n) = n*(4*n^4 + 1).at n=7A069078Numbers k such that (14*10^k - 101)/3 is prime.at n=22A284886