%I
%S 0,1,3,4,6,8,10,15,16,21,24,28,35,36,45,48,55,63,64,66,78,80,91,99,
%T 100,105,120,136,143,144,153,168,171,190,195,196,210,224,231,253,255,
%U 256,276,300,324,325,351,378,400,406,435,465,484,576,676,784,900
%N Union of triangular numbers, even squares, and one less the odd squares, without duplicates.
%C Numbers of form k(k+1)/2, (2k)^2, or (2k+1)^21, k>=0.
%t Union[Flatten[Table[{(n + 1)^2  1, (2*n + 1)*(2*n + 1  1)/2, (2*n)^2, (2*n)*(2*n  1)/2}, {n, 0, 15}]]]
%Y Unique values of union of A000217, A016742, and A033996.
%Y Cf. A120722.
%K nonn
%O 1,3
%A _Roger L. Bagula_, Jun 22 2007
%E Edited by _Ralf Stephan_, Oct 20 2013
