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A183860 n+floor(sqrt(3n+1)); complement of A183861. 1

%I

%S 3,4,6,7,9,10,11,13,14,15,16,18,19,20,21,23,24,25,26,27,29,30,31,32,

%T 33,34,36,37,38,39,40,41,43,44,45,46,47,48,49,51,52,53,54,55,56,57,58,

%U 60,61,62,63,64,65,66,67,69,70,71,72,73,74,75,76,77,79,80,81,82,83,84,85,86,87,88,90,91,92,93,94,95,96,97,98,99,101,102,103,104,105,106

%N n+floor(sqrt(3n+1)); complement of A183861.

%F a(n)=n+floor(sqrt(3n+1)).

%t a=3;b=1;

%t Table[n+Floor[(a*n+b)^(1/2)],{n,90}]

%t Table[n-1+Ceiling[(n*n-b)/a],{n,70}]

%Y Cf. A183861.

%K nonn,easy

%O 1,1

%A _Clark Kimberling_, Jan 07 2011

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Last modified September 18 04:00 EDT 2021. Contains 347506 sequences. (Running on oeis4.)