Primes of the form m*(m+1)/2 + 4.

Terms

a(0) =5a(1) =7a(2) =19a(3) =59a(4) =109a(5) =157a(6) =257a(7) =439a(8) =599a(9) =907a(10) =1039a(11) =1229a(12) =1279a(13) =1489a(14) =1657a(15) =3407a(16) =3659a(17) =4099a(18) =5569a(19) =6907a(20) =7507a(21) =7879a(22) =8389a(23) =9049a(24) =10589a(25) =11329a(26) =11939a(27) =14369a(28) =16657a(29) =17209