Triangular numbers T such that T+1 is a prime.

Terms

a(0) =1a(1) =6a(2) =10a(3) =28a(4) =36a(5) =66a(6) =78a(7) =136a(8) =190a(9) =210a(10) =276a(11) =378a(12) =630a(13) =820a(14) =946a(15) =990a(16) =1128a(17) =1326a(18) =1596a(19) =1830a(20) =2016a(21) =2080a(22) =2346a(23) =2556a(24) =2850a(25) =2926a(26) =3570a(27) =3916a(28) =4560a(29) =4656