365444363domain: NAppears in sequencesApproximations up to 2^n for 2-adic integer log_(-3)(5).at n=29A321082Approximations up to 2^n for 2-adic integer log_(-3)(5).at n=30A321082a(n) is the least nonnegative integer k such that the 2-valuation of 3^k+5 is n, or -1 if no such number exists.at n=31A368350