Numbers k such that 5^k mod k = 5^k mod k^2.

Terms

a(0) =1a(1) =2a(2) =4a(3) =5a(4) =6a(5) =12a(6) =25a(7) =42a(8) =52a(9) =84a(10) =125a(11) =156a(12) =186a(13) =372a(14) =625a(15) =1092a(16) =1218a(17) =1302a(18) =1806a(19) =2436a(20) =2604a(21) =2756a(22) =3125a(23) =3612a(24) =4836a(25) =5334a(26) =7212a(27) =8268a(28) =10668a(29) =12324