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%I #3 Mar 30 2012 17:36:44
%S 210,321,420,432,531,543,630,642,654,741,753,765,840,852,864,876,951,
%T 963,975,987,1050,1062,1074,1086,1098,1161,1173,1185,1197,1260,1272,
%U 1284,1296,1371,1383,1395,1470,1482,1494,1581,1593,1680,1692,1791,1890
%N Concatenation of 3 or more numbers in arithmetic progression with negative common difference.
%C This sequence, A119426 and the three-digit and larger terms of A010785 are subsequences of A034840.
%e 420 is the concatenation of 4, 2 and 0, which have common difference -2.
%Y Cf. A119426, A010785, A034840.
%K base,nonn
%O 0,1
%A _Rick L. Shepherd_, May 22 2006