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%I #8 Apr 05 2016 07:27:44
%S 1,3,8,14,21,30,40,51,63,76,91,107,124,142,161,181,203,226,250,275,
%T 301,328,356,385,416,448,481,515,550,586,623,661,700,741,783,826,870,
%U 915,961,1008,1056,1105,1155,1207,1260,1314,1369,1425,1482,1540
%N a(n) = a(n-1) + c(n) for n >= 3, a( ) increasing, given a(1)=1 a(2)=3; where c( ) is complement of a( ).
%H Ivan Neretin, <a href="/A022947/b022947.txt">Table of n, a(n) for n = 1..10000</a>
%t Fold[Append[#1, #1[[-1]] + Complement[Range[Max@#1 + 3], #1][[#2]]] &, {1, 3}, Range[3, 50]] (* _Ivan Neretin_, Apr 05 2016 *)
%Y Cf. A005228 and references therein.
%K nonn
%O 1,2
%A _Clark Kimberling_
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