Numbers k such that 7*k+1 divides 7^k+1.

Terms

a(0) =0a(1) =1a(2) =135a(3) =5733a(4) =11229a(5) =42705a(6) =50445a(7) =117649a(8) =131365a(9) =168093a(10) =636405a(11) =699825a(12) =1269495a(13) =2528155a(14) =4226175a(15) =6176709a(16) =6502545a(17) =9365265a(18) =9551115a(19) =13227021a(20) =14464485a(21) =14912625a(22) =20859435a(23) =26903605a(24) =28251265a(25) =30589905a(26) =32660901a(27) =37597329a(28) =41506875a(29) =42766465