1691820domain: NAppears in sequencesLeast number k such that 7^(2^i) + k is prime for i = 0,1,..,n-1.at n=6A161719Least numbers k for each base b >= 2 such that N = b^(2^n) + k is prime for 7 consecutive values from n = 0 to n = 6.at n=5A225560