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%I #5 Nov 20 2020 14:19:29
%S 0,1,3,6,10,15,21,28,36,45,55,66,78,91,105,120,136,153,171,190,210,
%T 231,253,20,44,69,95,122,150,179,209,240,16,49,83,118,154,191,229,12,
%U 52,93,135,178,222,11,57,104,152,201,251,46,98,151,205,4,60,117,175,234,38,99
%N a(n) = n*(n+1)/2 mod 256.
%t Mod[Accumulate[Range[0,70]],256] (* _Harvey P. Dale_, Nov 20 2020 *)
%Y See A105198 for further information.
%K nonn
%O 0,3
%A _Oscar Takeshita_, May 01 2005
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