52139domain: NAppears in sequencesNumbers n such that n^2 = 11*m^2 + 11*m + 1.at n=3A105837Numbers k such that 2*6^k + 1 is prime.at n=32A120023a(n) = one-half of the number of cells in the central rectangle of the graph described in row 2n+1 of A333288.at n=34A337640