login
a(n) = (1/2)*s(n), where s(n) is the n-th even number in A026255.
1

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

%S 1,2,3,7,4,8,9,5,6,13,14,15,10,20,11,21,22,12,26,27,28,16,17,33,18,34,

%T 35,19,39,40,41,23,24,46,25,47,52,53,54,29,30,31,59,32,60,65,66,67,36,

%U 37,38,72,73,78,42,79,80,43,44,45,85,86,48

%N a(n) = (1/2)*s(n), where s(n) is the n-th even number in A026255.

%K nonn

%O 1,2

%A _Clark Kimberling_