Numbers k that divide 7^k + 2^k.

Terms

a(0) =1a(1) =3a(2) =9a(3) =27a(4) =39a(5) =81a(6) =117a(7) =171a(8) =243a(9) =351a(10) =507a(11) =513a(12) =729a(13) =1053a(14) =1521a(15) =1539a(16) =2187a(17) =2223a(18) =3081a(19) =3159a(20) =3249a(21) =4563a(22) =4617a(23) =5109a(24) =6123a(25) =6561a(26) =6591a(27) =6669a(28) =9243a(29) =9477