Primes p such that 2p - 1, 3p - 2, (p + 1)/2, and (p + 2)/3 are also prime.

Terms

a(0) =37a(1) =2557a(2) =3061a(3) =5581a(4) =88741a(5) =124021a(6) =157081a(7) =178537a(8) =216217a(9) =216757a(10) =217057a(11) =330661a(12) =344821a(13) =352081a(14) =387577a(15) =423481a(16) =459397a(17) =477577a(18) =521137a(19) =790861a(20) =806521a(21) =865957a(22) =869521a(23) =1369657a(24) =1517881a(25) =1673401a(26) =1704397a(27) =1710661a(28) =1970257a(29) =2132797