Primes of the form 5k^2 + 1.

Terms

a(0) =181a(1) =1621a(2) =6481a(3) =8821a(4) =35281a(5) =52021a(6) =58321a(7) =87121a(8) =103681a(9) =112501a(10) =131221a(11) =141121a(12) =151381a(13) =172981a(14) =184321a(15) =302581a(16) =380881a(17) =414721a(18) =450001a(19) =486721a(20) =544501a(21) =626581a(22) =691921a(23) =737281a(24) =784081a(25) =808021a(26) =1039681a(27) =1067221a(28) =1240021a(29) =1300501