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%I #13 Sep 08 2022 08:46:01
%S 0,2,3,4,5,5,6,7,7,7,8,8,9,9,9,10,10,10,11,11,11,12,12,12,12,13,13,13,
%T 14,14,14,14,14,15,15,15,15,16,16,16,16,16,17,17,17,17,17,18,18,18,18,
%U 18,19,19,19,19,19,19,20,20,20,20,20,21
%N Floor(sqrt(7*n)).
%H Vincenzo Librandi, <a href="/A202306/b202306.txt">Table of n, a(n) for n = 0..10000</a>
%F a(n) = A000196(7n).
%t Table[Floor[Sqrt[7n]],{n,0,80}].
%o (Magma) [Floor(Sqrt(7*n)) : n in [0..80]];\
%o (PARI) a(n)=sqrtint(7*n) \\ _Charles R Greathouse IV_, Jan 17 2012
%Y Cf. A172471, A202304, A202305.
%K nonn,easy
%O 0,2
%A _Vincenzo Librandi_, Jan 17 2012
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