%I #2 Mar 31 2012 13:46:50
%S 1,11,12,22,23,33,34,44,45,55,56,66,67,77,78,88,89,91,101,111,121,131,
%T 141,151,161,171,181,191,192,202,212,222,232,242,252,262,272,282,292,
%U 293,303,313,323,333,343,353,363,373,383,393,394,404,414,424,434,444
%N Slowest increasing sequence where the absolute difference between the last digit of a(n) and the first digit of a(n+1) equals 0.
%K base,easy,nonn
%O 1,2
%A _Eric Angelini_, Dec 16 2004