Numbers k such that k^3 divides 15^(k^2) - 1.

Terms

a(0) =1a(1) =2a(2) =4a(3) =7a(4) =8a(5) =14a(6) =16a(7) =28a(8) =56a(9) =68a(10) =112a(11) =136a(12) =226a(13) =272a(14) =406a(15) =452a(16) =476a(17) =812a(18) =904a(19) =952a(20) =1582a(21) =1624a(22) =1808a(23) =1904a(24) =2056a(25) =2758a(26) =3164a(27) =3248a(28) =4112a(29) =5516