36051016domain: NAppears in sequencesNumbers k for which the set {30*k-13, 30*k-11, 30*k-7, 30*k-1, 30*k+1, 30*k+7, 30*k+11, 30*k+13} forms a symmetrical prime octuplet.at n=28A145315Growth series for group with presentation < S, T : S^3 = T^6 = (S*T)^6 = 1 >.at n=19A298806