Primes of the form p=floor(T/6), T are triangular numbers.

Terms

a(0) =2a(1) =3a(2) =7a(3) =11a(4) =13a(5) =17a(6) =31a(7) =67a(8) =157a(9) =229a(10) =379a(11) =487a(12) =1291a(13) =1621a(14) =3217a(15) =3727a(16) =4051a(17) =4621a(18) =6007a(19) =7129a(20) =7879a(21) =9157a(22) =9661a(23) =10531a(24) =11071a(25) =12577a(26) =13567a(27) =15877a(28) =16987a(29) =23629