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 A247336 #21 Nov 14 2014 21:17:00 %S A247336 0,1,4,6,11,13,22,23,26,33,46,57,60,61,76,78,97,118,120,121,141,166, %T A247336 193,212,222,237,247,251,253,286,321,339,358,397,438,481,502,508,526, %U A247336 573,620,622,673,722,725,726,781,838,897,958,996,1013,1018,1021,1086,1153 %N A247336 Numbers of the form m^k - k - 1 with k > 0 and m > 1. %C A247336 Primes in a(n): 11, 13, 23, 61, 97, 193, 251, 397, 673, 1013, 1021, 1153, ... %F A247336 a(n + 1) = A057897(n) - 1. %e A247336 0 is in this sequence because 2^1 - 1 - 1 = 0, %e A247336 1 is in this sequence because 2^2 - 2 - 1 = 1. %Y A247336 Cf. A057897, A099226, A099228. %K A247336 nonn,easy %O A247336 1,3 %A A247336 _Juri-Stepan Gerasimov_, Sep 13 2014