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) |
|---|---|
| 0 | 13 |
| 1 | 133 |
| 2 | 373 |
| 3 | 733 |
| 4 | 1213 |
| 5 | 1813 |
| 6 | 2533 |
| 7 | 3373 |
| 8 | 4333 |
| 9 | 5413 |
| 10 | 6613 |
| 11 | 7933 |
| 12 | 9373 |
| 13 | 10933 |
| 14 | 12613 |
| 15 | 14413 |
| 16 | 16333 |
| 17 | 18373 |
| 18 | 20533 |
| 19 | 22813 |
| 20 | 25213 |
| 21 | 27733 |
| 22 | 30373 |
| 23 | 33133 |
| 24 | 36013 |
| 25 | 39013 |
| 26 | 42133 |
| 27 | 45373 |
| 28 | 48733 |
| 29 | 52213 |
| 30 | 55813 |
| 31 | 59533 |
| 32 | 63373 |
| 33 | 67333 |
| 34 | 71413 |
| 35 | 75613 |
| 36 | 79933 |
| 37 | 84373 |