%I
%S 1,2,4,4,6,6,10,10,10,10,36,36,66,66,196,196,196,196,568,568,568,568,
%T 1008,1008,1288,1288,1288,1288,8398,8398,8730,8730,50688,50688,124738,
%U 124738,124738,124738,155296,155296,155296,155296,155296,155296,155296,155296,1784476,1784476
%N Smallest number k > 0 such that b  r is even or r = 0 for all b = 1..n, r == k mod b.
%C a(n) is the smallest number for which A281071(a(n)) is greater than or equal to n.
%H Martin Janecke, <a href="/A281072/b281072.txt">Table of n, a(n) for n = 1..88</a>
%e a(3) = 4 because
%e 1 mod 2 = 1 where r > 0 and 2  1 is odd;
%e 2 mod 3 = 2 where r > 0 and 3  2 is odd;
%e 3 mod 2 = 1 where r > 0 and 2  1 is odd;
%e 4 mod 1 = 0 where r = 0,
%e 4 mod 2 = 0 where r = 0,
%e 4 mod 3 = 1 where 3  1 is even.
%Y Cf. A281071.
%K nonn,easy
%O 1,2
%A _Martin Janecke_, Jan 14 2017
