Primes equal to a centered triangular number plus 1.

Terms

a(0) =2a(1) =5a(2) =11a(3) =47a(4) =137a(5) =167a(6) =317a(7) =461a(8) =761a(9) =977a(10) =1307a(11) =1787a(12) =2111a(13) =2711a(14) =3677a(15) =4457a(16) =5861a(17) =7247a(18) =7457a(19) =9011a(20) =10211a(21) =13397a(22) =15761a(23) =17987a(24) =22511a(25) =23627a(26) =43607a(27) =45677a(28) =54437a(29) =56747