a(n) is the smallest m > n such that n^2*(n^2 + 1) divides m^2*(m^2 + 1).

Terms

a(0) =2a(1) =8a(2) =12a(3) =64a(4) =18a(5) =216a(6) =35a(7) =112a(8) =360a(9) =818a(10) =660a(11) =348a(12) =208a(13) =2744a(14) =693a(15) =4096a(16) =493a(17) =450a(18) =3420a(19) =4832a(20) =1071a(21) =2112a(22) =1242a(23) =13824a(24) =7800a(25) =17576a(26) =1998a(27) =4368a(28) =10133a(29) =1560