A287182 - OEIS

%I #8 Jun 04 2020 09:23:38

%S 7,17,21,23,30,40,50,54,56,63,67,69,73,75,82,92,96,98,105,115,125,129,

%T 131,138,148,158,162,164,171,175,177,181,183,190,200,204,206,213,217,

%U 219,223,225,232,236,238,242,244,251,261,265,267,274,284,294,298

%N Positions of 2 in A287179.

%H Clark Kimberling, <a href="/A287182/b287182.txt">Table of n, a(n) for n = 1..10000</a> (* terms 7754 ff. corrected by _Georg Fischer_, Jun 04 2020 *)

%t s = Nest[Flatten[# /. {0 -> {1, 0}, 1 -> {2, 0}, 2 -> 1}] &, {0}, 9] (* A287179 *)

%t Flatten[Position[s, 0]] (* A287180 *)

%t Flatten[Position[s, 1]] (* A287181 *)

%t Flatten[Position[s, 2]] (* A287182 *)

%Y Cf. A287179, A287180, A287181.

%K nonn,easy

%O 1,1

%A _Clark Kimberling_, May 23 2017