Primes of the form k(k+1)/2+2 (i.e., two more than a triangular number).

Terms

a(0) =2a(1) =3a(2) =5a(3) =17a(4) =23a(5) =47a(6) =107a(7) =173a(8) =233a(9) =353a(10) =467a(11) =563a(12) =743a(13) =863a(14) =1277a(15) =1433a(16) =1487a(17) =2213a(18) =2417a(19) =2777a(20) =3083a(21) =3323a(22) =4007a(23) =4373a(24) =5153a(25) =7877a(26) =8387a(27) =10733a(28) =11177a(29) =11783