1902569domain: NPropertiesPrimalityPrimeyesAppears in sequencesSolution of the complementary equation a(n) = 2*a(n-1) + b(n-2), where a(0) = 1, a(1) = 4, b(0) = 2, b(1) = 3, and (a(n)) and (b(n)) are increasing complementary sequences.at n=19A295059Prime numbersat n=142203