Primes of the form 4*n^2 + 2*n -1.

Terms

a(0) =5a(1) =19a(2) =41a(3) =71a(4) =109a(5) =271a(6) =419a(7) =599a(8) =701a(9) =811a(10) =929a(11) =1481a(12) =1979a(13) =2161a(14) =2351a(15) =2549a(16) =2969a(17) =3191a(18) =3659a(19) =4159a(20) =4421a(21) =4691a(22) =4969a(23) =5851a(24) =7481a(25) =8929a(26) =9311a(27) =10099a(28) =13109a(29) =14519