Numbers m such that m divides 10^m - 1.

Terms

a(0) =1a(1) =3a(2) =9a(3) =27a(4) =81a(5) =111a(6) =243a(7) =333a(8) =729a(9) =999a(10) =2187a(11) =2997a(12) =4107a(13) =6561a(14) =8991a(15) =12321a(16) =13203a(17) =19683a(18) =20439a(19) =26973a(20) =36963a(21) =39609a(22) =59049a(23) =61317a(24) =80919a(25) =110889a(26) =118827a(27) =151959a(28) =177147a(29) =183951