7508555437domain: NAppears in sequencesThe least prime p such that the highest power of 3 that divides p^2 + 2 is n.at n=21A257568One of the two successive approximations up to 3^n for the 3-adic integer sqrt(-2). These are the numbers congruent to 1 mod 3 (except for n = 0).at n=21A268924