A138966 - OEIS

%I #6 Oct 13 2013 10:09:31

%S 5,6,7,10,11,14,15,17,19,22,23,26,27,29,31,34,35,38,39,41,43,46,47,49,

%T 51,53,55,58,59,62,63,65,67,69,71,74,75,77,79,82,83,86,87,89,91,94,95,

%U 97,99,101,103,106,107,109,111,113,115,118,119,122,123,125,127,129,131

%N a(n) = n + (smallest composite > n).

%C 1 <= a(n+1) - a(n) <= 3.

%F a(n) = n + A113646(n+1). - _Michel Marcus_, Oct 13 2013

%e a(1)=1+4, a(2)=2+4, a(3)=3+4, a(4)=4+6, a(5)=5+6, a(6)=6+8.

%K nonn

%O 1,1

%A _Zak Seidov_, Apr 04 2008