71575domain: NAppears in sequencesNumbers k such that 77*2^k+1 is prime.at n=14A032388Numbers k such that the first k decimal digits < 6 of Pi, read as a base-6 number, form a prime.at n=10A065574Numbers that can be written as a^2 + 3*b^2 for some a, b in A155716 and also as c^2 + 6*d^2 for some c, d in A092572.at n=41A380295