Centered square numbers that are prime powers of the form (4n+1)^k.

Terms

a(0) =5a(1) =13a(2) =25a(3) =41a(4) =61a(5) =113a(6) =181a(7) =313a(8) =421a(9) =613a(10) =761a(11) =841a(12) =1013a(13) =1201a(14) =1301a(15) =1741a(16) =1861a(17) =2113a(18) =2381a(19) =2521a(20) =3121a(21) =3613a(22) =4513a(23) =5101a(24) =7321a(25) =8581a(26) =9661a(27) =9941a(28) =10513a(29) =12641