Triangular numbers equal to the sum of a prime number with its index.

Terms

a(0) =3a(1) =91a(2) =276a(3) =378a(4) =666a(5) =1225a(6) =2080a(7) =2145a(8) =2278a(9) =3486a(10) =4186a(11) =4560a(12) =5565a(13) =8646a(14) =11628a(15) =17020a(16) =18528a(17) =21115a(18) =22791a(19) =23220a(20) =25425a(21) =27730a(22) =32385a(23) =34716a(24) =41905a(25) =42195a(26) =43365a(27) =56616a(28) =69751a(29) =74691