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 | 0 |
| 2 | 1 |
| 3 | 3 |
| 4 | 14 |
| 5 | 23 |
| 6 | 44 |
| 7 | 62 |
| 8 | 121 |
| 9 | 4523 |
| 10 | 31377 |
| 11 | 75438 |
| 12 | 1259391 |
| 13 | 7366024 |
| 14 | 7816538 |
| 15 | 8426716 |
| 16 | 44132221 |
| 17 | 228558461 |
| 18 | 398885491 |