369628domain: NAppears in sequencesNumbers n such that 89*2^n-1 is prime.at n=20A050570Growth series for group with presentation < S, T : S^3 = T^3 = (S*T)^6 = 1 >.at n=18A298807Growth series for group with presentation < S, T : S^2 = T^3 = (S*T)^12 = 1 >.at n=36A299253