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%I #7 Sep 08 2022 08:45:50
%S 0,0,0,1,1,2,2,2,3,3,4,4,4,5,5,6,6,6,7,7,8,8,9,9,9,10,10,11,11,11,12,
%T 12,13,13,13,14,14,15,15,15,16,16,17,17,18,18,18,19,19,20,20,20,21,21,
%U 22,22,22,23,23,24,24,24,25,25,26,26,27,27,27,28,28,29,29,29,30,30,31,31
%N a(n) = floor(n*(sqrt(7)-sqrt(5))).
%H Vincenzo Librandi, <a href="/A172267/b172267.txt">Table of n, a(n) for n = 0..1000</a>
%t With[{c = Sqrt[7] - Sqrt[5]}, Floor[c Range[0, 80]]] (* _Vincenzo Librandi_, Aug 01 2013 *)
%o (Magma) [Floor(n*(Sqrt(7)-Sqrt(5))): n in [0..80]]; // _Vincenzo Librandi_, Aug 01 2013
%Y Cf. A172264, A172266-A172270, A172272-A172278.
%K nonn,easy
%O 0,6
%A _Vincenzo Librandi_, Jan 30 2010
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