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 | 2 |
| 2 | 3 |
| 3 | 4 |
| 4 | 6 |
| 5 | 14 |
| 6 | 54 |
| 7 | 210 |
| 8 | 390 |
| 9 | 594 |
| 10 | 3460 |
| 11 | 5028 |
| 12 | 5219 |
| 13 | 5332 |
| 14 | 8072 |
| 15 | 15796 |
| 16 | 16131 |
| 17 | 21456 |
| 18 | 29282 |
| 19 | 78790 |
| 20 | 85142 |
| 21 | 179972 |
| 22 | 211029 |
| 23 | 445773 |
| 24 | 464843 |
| 25 | 511056 |