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 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 3 |
| 6 | 6 |
| 7 | 14 |
| 8 | 34 |
| 9 | 95 |
| 10 | 280 |
| 11 | 854 |
| 12 | 2694 |
| 13 | 8714 |
| 14 | 28640 |
| 15 | 95640 |
| 16 | 323396 |
| 17 | 1105335 |
| 18 | 3813798 |
| 19 | 13269146 |
| 20 | 46509358 |
| 21 | 164107650 |
| 22 | 582538732 |
| 23 | 2079165208 |
| 24 | 7457847082 |
| 25 | 26873059986 |
| 26 | 97239032056 |
| 27 | 353218528324 |
| 28 | 1287658723550 |
| 29 | 4709785569184 |