100803789240domain: NAppears in sequencesSmallest k such that the numbers j*k - 1 and j*k + 1 are prime for 1 <= j <= n.at n=4A348348Numbers k such that k-1, k+1, 2k-1, 2k+1, 3k-1, 3k+1, 4k-1, 4k+1, 5k-1, and 5k+1 are all primes.at n=0A349321