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 | 4 |
| 3 | 10 |
| 4 | 22 |
| 5 | 61 |
| 6 | 120 |
| 7 | 356 |
| 8 | 665 |
| 9 | 2058 |
| 10 | 3732 |
| 11 | 11892 |
| 12 | 21153 |
| 13 | 68860 |
| 14 | 120835 |
| 15 | 399828 |
| 16 | 694590 |
| 17 | 2328066 |
| 18 | 4013088 |
| 19 | 13591364 |
| 20 | 23284424 |
| 21 | 79538750 |
| 22 | 135580865 |
| 23 | 466489520 |
| 24 | 791862354 |
| 25 | 2741310614 |
| 26 | 4637009300 |
| 27 | 16137748980 |
| 28 | 27215510265 |
| 29 | 95152639095 |
| 30 | 160053426720 |