Numbers k such that k^3 divides 5^(k^2) + 1.

Terms

a(0) =1a(1) =3a(2) =21a(3) =609a(4) =903a(5) =2667a(6) =9429a(7) =15501a(8) =18543a(9) =26187a(10) =77343a(11) =108507a(12) =114681a(13) =159663a(14) =212541a(15) =273441a(16) =318507a(17) =405447a(18) =537747a(19) =797349a(20) =1197483a(21) =1357503a(22) =1398747a(23) =1731387a(24) =2354961a(25) =3146703a(26) =3325749a(27) =4451181a(28) =4630227a(29) =4665801