a(n) is the minimal prime of the form 4k+1 for which s=A008784(n) is the minimal positive integer such that s*a(n)-floor(sqrt(s*a(n)))^2 is a square.

A145215

a(n) is the minimal prime of the form 4k+1 for which s=A008784(n) is the minimal positive integer such that s*a(n)-floor(sqrt(s*a(n)))^2 is a square.

Terms

    a(0) =5a(1) =41a(2) =353a(3) =1237a(4) =2749a(5) =3037a(6) =10369a(7) =6569a(8) =27253a(9) =38561a(10) =14897a(11) =33289a(12) =27917a(13) =171629a(14) =143513a(15) =76081a(16) =37649a(17) =373273a(18) =399181a(19) =63029a(20) =133157a(21) =637601a(22) =425197a(23) =94261a(24) =499321a(25) =910853a(26) =229849a(27) =149837

External references