%I #2 Mar 31 2012 13:46:50
%S 1,7,17,18,28,29,30,60,61,71,72,82,83,93,97,107,117,127,137,147,157,
%T 167,177,187,197,198,208,218,228,238,248,258,268,278,288,298,299,309,
%U 319,329,339,349,359,369,379,389,390,600,610,620,630,640,650,660,670,680
%N Slowest increasing sequence where the absolute difference between the last digit of a(n) and the first digit of a(n+1) equals 6.
%K base,easy,nonn
%O 1,2
%A _Eric Angelini_, Dec 16 2004