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%I #6 Nov 17 2017 09:56:39
%S 1,4,5,10,11,14,15,20,21,24,25,30,31,34,35,36,39,40,45,46,49,55,56,57,
%T 59,60,61,65,66,67,70,76,77,80,84,85,86,88,89,91,92,94,95,98,101,104,
%U 105,108,111,114,119,120,121,123,124,125,129,130,131,134,139
%N Sum of 1, 2 or 3 distinct tetrahedral numbers.
%t Module[{nn=10,tetra},tetra=Table[(n(n+1)(n+2))/6,{n,nn}];Rest[Union[ Total/@ Subsets[tetra,3]]]] (* _Harvey P. Dale_, Nov 17 2017 *)
%Y Cf. A104246, A102795-A102806, A102855-A102858.
%K nonn
%O 1,2
%A _Jud McCranie_, Mar 01 2005
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