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%I #8 Mar 29 2017 04:18:53
%S 210,321,432,543,654,765,876,987,1098,11109,121110,131211,141312,
%T 151413,161514,171615,181716,191817,201918,212019,222120,232221,
%U 242322,252423,262524,272625,282726,292827,302928,313029,323130,333231,343332,353433,363534
%N Numbers whose decimal expansion is a concatenation of 3 consecutive decreasing numbers.
%e a(13)=141312 because 14 and 13 and 12 are three consecutive decreasing numbers
%t Table[FromDigits[Flatten[IntegerDigits[#]&/@Range[n,n-2,-1]]],{n,2,40}] (* _Harvey P. Dale_, Nov 28 2013 *)
%Y Cf. A127421-A127424.
%K nonn,base
%O 1,1
%A _Artur Jasinski_, Jan 14 2007
%E Corrected and extended by _Harvey P. Dale_, Nov 28 2013
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