Primes p such that (p+1)/2 and (p+2)/3 are also primes.

Terms

a(0) =13a(1) =37a(2) =157a(3) =541a(4) =877a(5) =1201a(6) =1381a(7) =1621a(8) =2017a(9) =2557a(10) =2857a(11) =3061a(12) =4357a(13) =4441a(14) =5077a(15) =5581a(16) =5701a(17) =6337a(18) =6637a(19) =6661a(20) =6997a(21) =7417a(22) =8221a(23) =9181a(24) =9661a(25) =9901a(26) =10837a(27) =11497a(28) =12457a(29) =12601