114340domain: NAppears in sequencesNumbers k such that (4*10^k + 83)/3 is prime.at n=27A280861Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(1) + b(2) + ... + b(n-1), where a(0) = 1, a(1) = 2, b(0) = 3, and (a(n)) and (b(n)) are increasing complementary sequences.at n=19A295054