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%I #9 Dec 25 2016 01:00:26
%S 1413,7187,12421,22751,28862,48046,36094,46372,54214,72845,88119,
%T 107246,125589,104153,43838,45893,55054,62090,66226,70187,69638,74941,
%U 85303,81913,68891,77237,37997,48758,42827,45554,22217,26617,29422,29099
%N 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 This sequence is related to the sequences A071110 (for 5 successive integers) and A060316 (for 6 successive integers) and others sequences to come...
%C Asymptotically the sequence tends to 67 (the first n for which a(n)=67 is n=1042).
%H Gilles A. Fleury, <a href="/A143192/b143192.txt">Table of n, a(n) for n = 0..1500</a>
%Y Cf. A071110, A060316, A071107, A060315, A141494, A142153.
%K nonn
%O 0,1
%A _Gilles A.Fleury_, Oct 18 2008, Mar 06 2009