Numbers n such that 7^A000010(n) == 1 (mod n^2).

Terms

a(0) =4a(1) =5a(2) =10a(3) =20a(4) =40a(5) =80a(6) =491531a(7) =983062a(8) =1966124a(9) =2457655a(10) =3932248a(11) =4915310a(12) =6389903a(13) =9339089a(14) =9830620a(15) =12288275a(16) =12779806a(17) =18678178a(18) =19169709a(19) =19661240a(20) =24576550a(21) =25559612a(22) =28017267a(23) =31949515a(24) =37356356a(25) =38339418a(26) =39322480a(27) =46695445a(28) =49153100a(29) =51119224