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A127423 a(1) = 1; for n>1, a(n) = n concatenated with n-1. +0
1
1, 21, 32, 43, 54, 65, 76, 87, 98, 109, 1110, 1211, 1312, 1413, 1514, 1615, 1716, 1817, 1918, 2019, 2120, 2221, 2322, 2423, 2524, 2625, 2726, 2827, 2928, 3029, 3130, 3231, 3332, 3433, 3534, 3635, 3736, 3837, 3938, 4039, 4140, 4241, 4342, 4443, 4544, 4645 (list; graph; listen)
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Last modified December 7 08:40 EST 2009. Contains 170430 sequences.


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