This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A328033 #23 Feb 08 2024 01:47:43 %S A328033 1,13,793,1943,150341,183793,2348789,26052527,27982637,54789869, %T A328033 1588344433,3928538029,8115802931,16936276919,17786709541,47778790033, %U A328033 973094452518029 %N A328033 Numbers m that divide 7^m + 6. %C A328033 Conjecture: For k > 1, k^m == 1 - k (mod m) has infinite number of positive solutions. %C A328033 Also includes 2073273696480171732497. - _Giovanni Resta_, Oct 04 2019 %o A328033 (Magma) [1] cat [n: n in [1..10^8] | Modexp(7, n, n) + 6 eq n]; %Y A328033 Solutions to k^m == 1-k (mod m): A006521 (k = 2), A015973 (k = 3), A327840 (k = 4), A123047 (k = 5), A327943 (k = 6), this sequence (k = 7), A327468 (k = 8). %Y A328033 Cf. A253210 (7^n + 6). %K A328033 nonn,more %O A328033 1,2 %A A328033 _Juri-Stepan Gerasimov_, Oct 02 2019 %E A328033 a(12)-a(16) from _Giovanni Resta_, Oct 04 2019 %E A328033 a(17) from _Max Alekseyev_, Feb 07 2024