A321370 - OEIS

%I #9 Jul 10 2020 03:51:31

%S 4,8,12,17,22,26,31,35,40,45,49,53,59,63,67,71,77,81,85,90,94,99,104,

%T 108,112,118,122,126,130,136,140,144,149,154,158,163,167,171,177,181,

%U 185,189,195,199,203,208,213,217,222,226,231,236,240,244,248,254

%N n + [n*s/r] + [n*t/r], where r = 1, s = cos(2*Pi/5), t = sec(2*Pi/5).

%C See Comments at A190082.

%H Clark Kimberling, <a href="/A321370/b321370.txt">Table of n, a(n) for n = 1..10000</a>

%t r = 1; s = Cos[2 Pi/5]; t = Sec[2 Pi/5];

%t a[n_] := n + Floor[n*s/r] + Floor[n*t/r];

%t b[n_] := n + Floor[n*r/s] + Floor[n*t/s];

%t c[n_] := n + Floor[n*r/t] + Floor[n*s/t];

%t z = 120;

%t Table[a[n], {n, 1, z}]  (* A321370 *)

%t Table[b[n], {n, 1, z}]  (* A321371 *)

%t Table[c[n], {n, 1, z}]  (* A321372 *)

%Y Cf. A190082, A321371, A321372.

%K nonn

%O 1,1

%A _Clark Kimberling_, Nov 08 2018