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A007908 as a simple table

n a(n)
1 1
2 12
3 123
4 1234
5 12345
6 123456
7 1234567
8 12345678
9 123456789
10 12345678910
11 1234567891011
12 123456789101112
13 12345678910111213
14 1234567891011121314
15 123456789101112131415
16 12345678910111213141516
17 1234567891011121314151617

[1,12,123,1234,12345,123456,1234567,12345678,
 123456789,12345678910,1234567891011,
 123456789101112,12345678910111213,
 1234567891011121314,123456789101112131415,
 12345678910111213141516,1234567891011121314151617]

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Last modified September 24 02:34 EDT 2017. Contains 292400 sequences.