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 | 0 |
| 1 | 7 |
| 2 | 14 |
| 3 | 42 |
| 4 | 147 |
| 5 | 321 |
| 6 | 473 |
| 7 | 322 |
| 8 | 785 |
| 9 | 1779 |
| 10 | 3039 |
| 11 | 1957 |
| 12 | 16446 |
| 13 | 274134 |
| 14 | 374781 |
| 15 | 110639 |
| 16 | 248175 |
| 17 | 385504 |
| 18 | 2359264 |
| 19 | 5108010 |
| 20 | 3822244 |
| 21 | 3812946 |
| 22 | 9896631 |