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 | 5 |
| 3 | 14 |
| 4 | 43 |
| 5 | 144 |
| 6 | 523 |
| 7 | 2048 |
| 8 | 8597 |
| 9 | 38486 |
| 10 | 182905 |
| 11 | 919146 |
| 12 | 4866871 |
| 13 | 27068420 |
| 14 | 157693007 |
| 15 | 959873708 |
| 16 | 6091057009 |
| 17 | 40213034874 |
| 18 | 275699950381 |
| 19 | 1959625294310 |
| 20 | 14418124498211 |
| 21 | 109655727901592 |
| 22 | 860946822538675 |
| 23 | 6969830450679864 |
| 24 | 58114638923638573 |