Numbers k such that k^3 divides 9^(k^2) - 1.

Terms

a(0) =1a(1) =2a(2) =4a(3) =8a(4) =10a(5) =20a(6) =40a(7) =68a(8) =82a(9) =110a(10) =136a(11) =164a(12) =220a(13) =328a(14) =340a(15) =410a(16) =440a(17) =610a(18) =680a(19) =772a(20) =820a(21) =1010a(22) =1210a(23) =1220a(24) =1510a(25) =1544a(26) =1640a(27) =2020a(28) =2420a(29) =2440