152529domain: NAppears in sequencesNumbers k such that 2*3^k + 1 is prime.at n=34A003306Number of permutations in S_n avoiding 5{bar 1}{bar 2}43 (i.e., every occurrence of 543 is contained in an occurrence of a 51243).at n=11A137549Numbers k such that 2*3^k + 1 is prime and divides Phi(3^m, 2).at n=9A334993