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%I
%S 0,1,1,1,1,1,2,2,2,2,2,2,3,3,3,3,3,3,4,4,4,4,4,4,5,5,5,5,5,5,6,6,6,6,
%T 6,7,7,7,7,7,7,8,8,8,8,8,8,9,9,9,9,9,9,10,10,10,10,10,10,11,11,11,11,
%U 11,11,12,12,12,12,12,13,13,13,13,13,13,14,14,14,14,14,14,15,15
%N 3*n-floor(2*n*sqrt(2)).
%H Vincenzo Librandi, <a href="/A195177/b195177.txt">Table of n, a(n) for n = 0..10000</a>
%F a(n)=3n-A022842(n). - _R. J. Mathar_, Jan 10 2013
%o (MAGMA) [3*n-Floor(2*n*(Sqrt(2))): n in [0..70]]; // Vincenzo Librandi, Sep 12 2011
%K nonn
%O 0,7
%A _Clark Kimberling_, Sep 10 2011
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