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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A252043 a(n) is the concatenation of first n terms of A033307.

Table of values

n a(n)
1 1
2 12
3 123
4 1234
5 12345
6 123456
7 1234567
8 12345678
9 123456789
10 1234567891
11 12345678910
12 123456789101
13 1234567891011
14 12345678910111
15 123456789101112
16 1234567891011121
17 12345678910111213
18 123456789101112131
19 1234567891011121314

List of values

[1, 12, 123, 1234, 12345, 123456, 1234567, 12345678, 123456789, 1234567891, 12345678910, 123456789101, 1234567891011, 12345678910111, 123456789101112, 1234567891011121, 12345678910111213, 123456789101112131, 1234567891011121314]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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