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 A143192 #9 Dec 25 2016 01:00:26 %S A143192 1413,7187,12421,22751,28862,48046,36094,46372,54214,72845,88119, %T A143192 107246,125589,104153,43838,45893,55054,62090,66226,70187,69638,74941, %U A143192 85303,81913,68891,77237,37997,48758,42827,45554,22217,26617,29422,29099 %N A143192 a(n) is the smallest natural number we cannot obtain from n, n+1, n+2, n+3, n+4, n+5, n+6, n+7 and the operators +, -, *, /, using each number only once. %C A143192 This sequence is related to the sequences A071110 (for 5 successive integers) and A060316 (for 6 successive integers) and others sequences to come... %C A143192 Asymptotically the sequence tends to 67 (the first n for which a(n)=67 is n=1042). %H A143192 Gilles A. Fleury, <a href="/A143192/b143192.txt">Table of n, a(n) for n = 0..1500</a> %Y A143192 Cf. A071110, A060316, A071107, A060315, A141494, A142153. %K A143192 nonn %O A143192 0,1 %A A143192 _Gilles A.Fleury_, Oct 18 2008, Mar 06 2009