Primes of the form triangular(p) + 1, where p is a prime.

Terms

a(0) =7a(1) =29a(2) =67a(3) =191a(4) =277a(5) =947a(6) =1129a(7) =2557a(8) =5779a(9) =8647a(10) =13367a(11) =14029a(12) =16111a(13) =22367a(14) =24977a(15) =31627a(16) =36857a(17) =47279a(18) =64621a(19) =87991a(20) =93097a(21) =96581a(22) =98347a(23) =109279a(24) =126757a(25) =163307a(26) =239087a(27) =282377a(28) =329267a(29) =342379