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 | 4 |
| 4 | 24 |
| 5 | 77 |
| 6 | 141 |
| 7 | 778 |
| 8 | 1421 |
| 9 | 1435 |
| 10 | 1620 |
| 11 | 14220 |
| 12 | 15035 |
| 13 | 45453 |
| 14 | 148533 |
| 15 | 148546 |
| 16 | 249122 |
| 17 | 471404 |
| 18 | 791597 |
| 19 | 4497399 |
| 20 | 2580747997 |
| 21 | 47180737658 |
| 22 | 148411814220 |
| 23 | 244989930458 |
| 24 | 447283652733 |
| 25 | 1422190795997 |
| 26 | 2581981034024 |