Numbers k such that p = k^2 + 1 is prime, as are p-6 and p+6.

Terms

a(0) =4a(1) =6a(2) =16a(3) =36a(4) =74a(5) =116a(6) =176a(7) =184a(8) =654a(9) =1276a(10) =1314a(11) =1394a(12) =1524a(13) =1546a(14) =1686a(15) =2676a(16) =3074a(17) =3196a(18) =3314a(19) =3504a(20) =3534a(21) =3624a(22) =3884a(23) =4026a(24) =4034a(25) =4384a(26) =4414a(27) =4786a(28) =5486a(29) =5566