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 | 1 |
| 2 | 3 |
| 3 | 15 |
| 4 | 46 |
| 5 | 4 |
| 6 | 448 |
| 7 | 1415 |
| 8 | 13 |
| 9 | 14143 |
| 10 | 44722 |
| 11 | 14 |
| 12 | 447215 |
| 13 | 45 |
| 14 | 4472137 |
| 15 | 14142137 |
| 16 | 140 |
| 17 | 141421357 |
| 18 | 447213596 |
| 19 | 1414213563 |
| 20 | 4472135956 |
| 21 | 14142135625 |
| 22 | 44721359551 |
| 23 | 141421356238 |
| 24 | 447213595501 |
| 25 | 1414213562374 |
| 26 | 4472135955001 |
| 27 | 14142135623732 |
| 28 | 44721359549997 |
| 29 | 141421356237311 |
| 30 | 447213595499959 |