A047880 - OEIS

%I #7 May 24 2021 00:34:17

%S 0,5,5,9,12,19,25,35,41,54,63,78,88,106,118,139,152,175,191,217,233,

%T 262,281,312,332,366,388,425,448,487,513,555,581,626,655,702,732,782,

%U 814,867,900,955,991,1049,1085,1146,1185,1248,1288

%N a(n) = A047879(n) / 2.

%K nonn

%O 0,2

%A _Clark Kimberling_

%E Name corrected by _Sean A. Irvine_, May 23 2021