A281072 Smallest number k > 0 such that b - r is even or r = 0 for all b = 1..n, r == k mod b.
1, 2, 4, 4, 6, 6, 10, 10, 10, 10, 36, 36, 66, 66, 196, 196, 196, 196, 568, 568, 568, 568, 1008, 1008, 1288, 1288, 1288, 1288, 8398, 8398, 8730, 8730, 50688, 50688, 124738, 124738, 124738, 124738, 155296, 155296, 155296, 155296, 155296, 155296, 155296, 155296, 1784476, 1784476
Offset: 1
Examples
a(3) = 4 because 1 mod 2 = 1 where r > 0 and 2 - 1 is odd; 2 mod 3 = 2 where r > 0 and 3 - 2 is odd; 3 mod 2 = 1 where r > 0 and 2 - 1 is odd; 4 mod 1 = 0 where r = 0, 4 mod 2 = 0 where r = 0, 4 mod 3 = 1 where 3 - 1 is even.
Links
- Martin Janecke, Table of n, a(n) for n = 1..88
Crossrefs
Cf. A281071.
Comments