(p^2-5)/4 for odd primes p.

Terms

a(0) =1a(1) =5a(2) =11a(3) =29a(4) =41a(5) =71a(6) =89a(7) =131a(8) =209a(9) =239a(10) =341a(11) =419a(12) =461a(13) =551a(14) =701a(15) =869a(16) =929a(17) =1121a(18) =1259a(19) =1331a(20) =1559a(21) =1721a(22) =1979a(23) =2351a(24) =2549a(25) =2651a(26) =2861a(27) =2969a(28) =3191a(29) =4031