1278401domain: NPropertiesPrimalityPrimeyesAppears in sequencesa(n) is the number of consecutive even prime gaps (g1, g2) satisfying g1 == 2 (mod 6) and g2 == 4 (mod 6) out of the first 2^n consecutive even prime gaps.at n=23A346777Primes p such that 2p-1 is a square and 2p+1 is also prime.at n=23A386995Prime numbersat n=98492