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) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 7 |
| 3 | 32 |
| 4 | 137 |
| 5 | 592 |
| 6 | 2597 |
| 7 | 11442 |
| 8 | 50567 |
| 9 | 224112 |
| 10 | 995392 |
| 11 | 4428372 |
| 12 | 19727877 |
| 13 | 87983202 |
| 14 | 392755207 |
| 15 | 1754625632 |
| 16 | 7844003907 |
| 17 | 35086658052 |
| 18 | 157023432677 |
| 19 | 703037135122 |
| 20 | 3148915010832 |
| 21 | 14108913792342 |
| 22 | 63235380631747 |
| 23 | 283495965998772 |
| 24 | 1271282293531077 |
| 25 | 5702105357347602 |