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 A252474 #13 Jan 16 2015 18:20:12 %S A252474 1,2,3,4,5,6,7,8,9,10,11,12,14,15,16,17,18,19,20,21,22,23,24,25,26,27, %T A252474 28,29,30,32,33,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,52,53, %U A252474 55,57,59,60,61 %N A252474 Record values in A246785. %C A252474 For all known terms of this sequence, a(n+1) < a(n)+3; is this true for all terms? - _Farideh Firoozbakht_, Dec 20 2014 %C A252474 Integers not in this sequence begin: 13, 31, 34, 51, 54, 56, 58. %C A252474 The comment above could also be phrased as "no two consecutive numbers in the complement" or "no gaps larger than one". But one sees that the missing numbers become more frequent towards larger values, so the answer to the question might well be "no". - _Robert Price_, Jan 06 2015 %Y A252474 Cf. A182134, A246785, A246790. %K A252474 more,hard,nonn %O A252474 1,2 %A A252474 _Robert Price_, Dec 17 2014