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 | 4 |
| 2 | 23 |
| 3 | 32 |
| 4 | 215 |
| 5 | 1261 |
| 6 | 538 |
| 7 | 4797 |
| 8 | 17612 |
| 9 | 32311 |
| 10 | 375482 |
| 11 | 512959 |
| 12 | 1847532 |
| 13 | 8295710 |
| 14 | 8885853 |
| 15 | 80798025 |