Numbers k such that k | 8^k + 1.

Terms

a(0) =1a(1) =3a(2) =9a(3) =27a(4) =57a(5) =81a(6) =171a(7) =243a(8) =513a(9) =729a(10) =1083a(11) =1539a(12) =2187a(13) =3249a(14) =4401a(15) =4617a(16) =6561a(17) =9747a(18) =13203a(19) =13851a(20) =19683a(21) =20577a(22) =29241a(23) =32547a(24) =39609a(25) =41553a(26) =59049a(27) =61731a(28) =83619a(29) =87723