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%I #2 Mar 30 2012 18:34:45
%S 9,10,12,14,16,19,22,26,30,35,41,48,56,65,76,89,103,121,141,164,192,
%T 224,261,304,355,414,483,564,658,767,895,1044,1218,1421,1658,1935,
%U 2257,2633,3072,3584
%N a(1)=9; a(n)=floor((55+sum(a(1) to a(n-1)))/6).
%Y Cf. A073941, A112088, A072493.
%K nonn
%O 1,1
%A _Graeme McRae_, Jun 10 2006