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 | 2 |
| 3 | 6 |
| 4 | 7 |
| 5 | 9 |
| 6 | 42 |
| 7 | 46 |
| 8 | 431 |
| 9 | 1806 |
| 10 | 2506 |
| 11 | 11318 |
| 12 | 16965 |
| 13 | 25426 |
| 14 | 33146 |
| 15 | 33361 |
| 16 | 37053 |
| 17 | 49365 |
| 18 | 99221 |
| 19 | 224506 |
| 20 | 359703 |
| 21 | 436994 |