|
%I #14 Mar 15 2021 09:53:18
%S 2,3,5,8,10,14,17,21,26,30,36,41,47,54,60,68,75,83,92,100,110,119,129,
%T 140,150,162,173,185,198,210,224,237,251,266,280,296,311,327,344,360,
%U 378,395,413,432,450,470,489,509,530,550,572,593,615,638,660,684,707,731,756,780,806,831,857,884,910,938,965,993,1022,1050,1080,1109,1139,1170,1200,1232,1263,1295,1328,1360
%N a(n) = n + ceiling( (1/5)*n^2 ). Complement of A183870.
%H <a href="/index/Rec">Index entries for linear recurrences with constant coefficients</a>, signature (2,-1,0,0,1,-2,1).
%F a(n) = floor( (n+1)*(n+4)/5 ). [_Bruno Berselli_, Mar 05 2014]
%t a=5; b=-5;
%t Table[n+Floor[(a*n+b)^(1/2)],{n,100}]
%t Table[n-1+Ceiling[(n*n-b)/a],{n,80}]
%Y Cf. A183870.
%K nonn,easy
%O 1,1
%A _Clark Kimberling_, Jan 07 2011
|
