190547domain: NAppears in sequencesIntegers n such that 6n, 36n, and 216n fall between pairs of twin primes, that is, 6n-1, 6n+1, 36n-1, 36n+1, 216n-1, and 216n+1 are prime.at n=36A192851Numbers k such that (43*10^k + 83)/9 is prime.at n=22A291202