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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.

A262575 Concatenation of the numbers from 1 to n but omitting 5.

Table of values

n a(n)
1 1
2 12
3 123
4 1234
5 12346
6 123467
7 1234678
8 12346789
9 1234678910
10 123467891011
11 12346789101112
12 1234678910111213
13 123467891011121314
14 12346789101112131415
15 1234678910111213141516
16 123467891011121314151617
17 12346789101112131415161718
18 1234678910111213141516171819
19 123467891011121314151617181920

List of values

[1, 12, 123, 1234, 12346, 123467, 1234678, 12346789, 1234678910, 123467891011, 12346789101112, 1234678910111213, 123467891011121314, 12346789101112131415, 1234678910111213141516, 123467891011121314151617, 12346789101112131415161718, 1234678910111213141516171819, 123467891011121314151617181920]

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

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