1115113domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes of the form p*q+2 where p and q are consecutive primes.at n=27A048880Solution of the complementary equation a(n) = 2*a(n-1) + b(n-1), where a(0) = 1, a(1) = 4, b(0) = 2, and (a(n)) and (b(n)) are increasing complementary sequences.at n=18A295056Prime numbersat n=86829