226637domain: NPropertiesPrimalityPrimeyesAppears in sequencesa(n) = 12*a(n-1) - 31*a(n-2) for n > 1; a(0) = 1, a(1) = 7.at n=6A163306Primes p such that p + 6, p + 12, p + 20, p + 26 and p + 32 are also primes.at n=26A384769Prime numbersat n=20153