%I #2 Mar 31 2012 13:46:50
%S 1,10,20,21,101,111,121,131,141,151,161,171,181,190,200,210,220,230,
%T 240,250,260,270,280,290,291,1001,1011,1021,1031,1041,1051,1061,1071,
%U 1081,1091,1101,1111,1121,1131,1141,1151,1161,1171,1181,1191
%N Slowest increasing sequence where the last digit of n and the first digit of n+1 sum to 2.
%K base,easy,nonn
%O 1,2
%A _Eric Angelini_, Oct 25 2004