Numbers k that divide 8^k + 7^k.

Terms

a(0) =1a(1) =3a(2) =5a(3) =9a(4) =15a(5) =25a(6) =27a(7) =45a(8) =57a(9) =75a(10) =81a(11) =125a(12) =135a(13) =171a(14) =225a(15) =243a(16) =285a(17) =375a(18) =405a(19) =513a(20) =625a(21) =675a(22) =729a(23) =855a(24) =915a(25) =1083a(26) =1125a(27) =1215a(28) =1425a(29) =1539