%I A037567
%S A037567 2,22,221,2212,22122,221221,2212212,22122122,221221221,2212212212,
%T A037567 22122122122,221221221221,2212212212212,22122122122122,221221221221221,
%U A037567 2212212212212212
%N A037567 Base 10 digits are, in order, the first n terms of the periodic sequence 
               with initial period 2,2,1.
%F A037567 a(n)=10*a(n-1)+(1/9)*{8*(n mod 3)+5*[(n+1) mod 3]+2*[(n+2) mod 3]}, with 
               a(0)=0 [From Paolo P. Lava (ppl(AT)spl.at), Jul 30 2009]
%Y A037567 Sequence in context: A007613 A043037 A058441 this_sequence A137109 A002276 
               A112893
%Y A037567 Adjacent sequences: A037564 A037565 A037566 this_sequence A037568 A037569 
               A037570
%K A037567 nonn,base
%O A037567 1,1
%A A037567 Clark Kimberling (ck6(AT)evansville.edu)