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 A183858 a(n) = n + floor(sqrt(3n)). 2

%I #18 Jul 07 2024 11:40:22

%S 2,4,6,7,8,10,11,12,14,15,16,18,19,20,21,22,24,25,26,27,28,30,31,32,

%T 33,34,36,37,38,39,40,41,42,44,45,46,47,48,49,50,52,53,54,55,56,57,58,

%U 60,61,62,63,64,65,66,67,68,70,71,72,73,74,75,76,77,78,80,81,82,83,84,85,86,87,88,90,91,92,93,94,95,96,97,98,99,100,102,103,104,105,106,107,108,109,110,111,112,114,115,116,117

%N a(n) = n + floor(sqrt(3n)).

%C Complement of A183859.

%H Harvey P. Dale, <a href="/A183858/b183858.txt">Table of n, a(n) for n = 1..1000</a>

%t a=3; b=0;

%t Table[n+Floor[(a*n+b)^(1/2)],{n,100}]

%t Table[n-1+Ceiling[(n*n-b)/a],{n,80}]

%t Table[n+Floor[Sqrt[3n]],{n,100}] (* _Harvey P. Dale_, Jul 07 2024 *)

%o (PARI) a(n)=n+sqrtint(3*n)

%Y Cf. A183859.

%K nonn,easy

%O 1,1

%A _Clark Kimberling_, Jan 07 2011

%E Corrected by _Charles R Greathouse IV_, Jan 19 2011

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Last modified September 8 22:43 EDT 2024. Contains 375759 sequences. (Running on oeis4.)