Smallest k such that k^2+1 is divisible by A002144(n)^4.

Terms

a(0) =182a(1) =239a(2) =27493a(3) =34522a(4) =800982a(5) =1251967a(6) =623098a(7) =6304056a(8) =6459524a(9) =20099637a(10) =22709274a(11) =35764191a(12) =40317977a(13) =54397650a(14) =166206108a(15) =187800003a(16) =165728858a(17) =152475014a(18) =282599844a(19) =312923750a(20) =154613663a(21) =485200742a(22) =912190662a(23) =548850444