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.
| n | a(n) |
|---|---|
| 1 | 13 |
| 2 | 31 |
| 3 | 103 |
| 4 | 211 |
| 5 | 1021 |
| 6 | 1201 |
| 7 | 2011 |
| 8 | 3001 |
| 9 | 10111 |
| 10 | 20011 |
| 11 | 20101 |
| 12 | 21001 |
| 13 | 100003 |
| 14 | 102001 |
| 15 | 1000003 |
| 16 | 1011001 |
| 17 | 1020001 |
| 18 | 1100101 |
| 19 | 2100001 |
| 20 | 10010101 |
| 21 | 10100011 |
| 22 | 20001001 |
| 23 | 30000001 |
| 24 | 101001001 |
| 25 | 200001001 |
| 26 | 1000000021 |
| 27 | 1000001011 |
| 28 | 1000010101 |
| 29 | 1000020001 |
| 30 | 1000200001 |
| 31 | 1002000001 |
| 32 | 1010000011 |