%I A008130
%S A008130 0,0,0,1,2,2,4,6,6,9,12,12,16,20,20,25,30,30,36,42,42,49,
%T A008130 56,56,64,72,72,81,90,90,100,110,110,121,132,132,144,156,
%U A008130 156,169,182,182,196,210,210,225,240,240,256,272,272,289
%N A008130 floor(n/3)*ceil(n/3).
%Y A008130 Sequence in context: A039731 A005341 A137268 this_sequence A055388 A065457 
               A000784
%Y A008130 Adjacent sequences: A008127 A008128 A008129 this_sequence A008131 A008132 
               A008133
%K A008130 nonn
%O A008130 0,5
%A A008130 N. J. A. Sloane (njas(AT)research.att.com).