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 | 2 |
| 3 | 5 |
| 4 | 12 |
| 5 | 14 |
| 6 | 25 |
| 7 | 29 |
| 8 | 54 |
| 9 | 60 |
| 10 | 62 |
| 11 | 3445 |
| 12 | 108995 |
| 13 | 3625182 |
| 14 | 13951972 |
| 15 | 28010901 |
| 16 | 7165572247 |
| 17 | 14335792539 |
| 18 | 114636743486 |
| 19 | 229264368709 |
| 20 | 458534096494 |