A059128 - OEIS

%I #8 Sep 12 2022 22:48:39

%S 1,2,1,3,4,3,1,2,1,5,6,5,7,8,7,5,6,5,1,2,1,3,4,3,1,2,1,9,10,9,11,12,

%T 11,9,10,9,1,2,1,3,4,3,1,2,1,5,6,5,7,8,7,5,6,5,1,2,1,3,4,3,1,2,1,13,

%U 14,13,15,16,15,13,14,13,1,2,1,3,4,3,1,2,1,5,6,5,7,8,7,5,6,5,1,2,1,3,4,3,1,2

%N A hierarchical sequence (W3{2,2} - see A059126).

%H J. Wallgren, <a href="/A059126/a059126.txt">Hierarchical sequences</a>

%F a(3n+1) = 2*A059126(1+n), a(3n) = a(3n+2) = a(3n+1) - 1. - _Sean A. Irvine_, Sep 12 2022

%K easy,nonn

%O 0,2

%A _Jonas Wallgren_, Jan 19 2001