%I #4 Mar 30 2012 18:56:05

%S 3,5,1,10,2,15,17,20,22,4,27,29,32,34,6,39,7,44,46,8,51,9,56,58,61,63,

%T 11,68,12,73,75,13,80,14,85,87,90,92,16,97,99,102,104,18,109,19,114,

%U 116,119,121,21,126,128,131,133,23,138,24,143,145

%N a(n) = (1/2)*s(n), where s(n) is the n-th even number in A026250. Also a(n) = position of n in A026253.

%K nonn

%O 1,1

%A _Clark Kimberling_