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%I #2 Mar 31 2012 13:46:50
%S 0,90,900,910,920,930,940,950,960,970,980,990,9000,9010,9020,9030,
%T 9040,9050,9060,9070,9080,9090,9100,9110,9120,9130,9140,9150,9160,
%U 9170,9180,9190,9200,9210,9220,9230,9240,9250,9260,9270,9280,9290,9300,9310,9320
%N Slowest increasing sequence where the absolute difference between the last digit of a(n) and the first digit of a(n+1) equals 9.
%K base,easy,nonn
%O 0,2
%A _Eric Angelini_, Dec 16 2004