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 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 5 |
| 5 | 11 |
| 6 | 36 |
| 7 | 122 |
| 8 | 538 |
| 9 | 2526 |
| 10 | 13166 |
| 11 | 71153 |
| 12 | 400109 |
| 13 | 2300430 |
| 14 | 13504780 |
| 15 | 80547558 |
| 16 | 487327904 |