990510domain: NAppears in sequencesNumbers k such that 4*k-1, 8*k-1, 16*k-1, 32*k-1, 64*k-1 and 128*k-1 are all primes.at n=7A101320Elements of A011185 that are also the sum of a pair of distinct elements of A011185.at n=37A133605