Triangular numbers t such that t+10 is a prime.

Terms

a(0) =1a(1) =3a(2) =21a(3) =91a(4) =153a(5) =171a(6) =231a(7) =253a(8) =561a(9) =741a(10) =1081a(11) =1653a(12) =1711a(13) =1891a(14) =2211a(15) =2701a(16) =3321a(17) =3403a(18) =4851a(19) =6441a(20) =8001a(21) =9453a(22) =9591a(23) =10153a(24) =12403a(25) =15051a(26) =16471a(27) =17391a(28) =18721a(29) =23653