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%I #13 Mar 06 2016 10:22:23
%S 3,4,5,6,7,8,9,11,12,14,15,17,20,21,23,24,27,29,32,35,36,37,39,41,44,
%T 45,47,48,50,51,55,56,57,59,60,62,63,65,69,71,72,74,76,77,80,81,84,87,
%U 89,91,92,93,95,99,101,102,104,105,107,108
%N a(n) = least positive integer > a(n-1) and not a(i)*a(j)-2 for 1<=i<j<=n.
%H Ivan Neretin, <a href="/A026458/b026458.txt">Table of n, a(n) for n = 1..1000</a>
%t a = {3, 4}; used = {a[[1]]*a[[2]] - 2}; Do[k = a[[-1]] + 1; While[MemberQ[used, k], k++]; used = Union[used, k*a - 2]; AppendTo[a, k], {n, 3, 60}]; a (* _Ivan Neretin_, Mar 06 2016 *)
%Y Cf. A026453 and references therein.
%K nonn
%O 1,1
%A _Clark Kimberling_
%E Definition corrected by _Harvey P. Dale_, Oct 16 2014
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