Numbers k such that f(k), f(k+1) and f(k+2) are all primes, where f(k) = (2k+1)^2 - 2 (A073577).

Terms

a(0) =1a(1) =2a(2) =16a(3) =58a(4) =149a(5) =177a(6) =534a(7) =681a(8) =954a(9) =1045a(10) =1052a(11) =1255a(12) =1367a(13) =1563a(14) =2046a(15) =2074a(16) =2515a(17) =2557a(18) =2564a(19) =2788a(20) =3586a(21) =3593a(22) =3908a(23) =4062a(24) =4552a(25) =5252a(26) =5371a(27) =5385a(28) =6400a(29) =6729