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 | 1 |
| 2 | 7 |
| 3 | 164 |
| 4 | 1337 |
| 5 | 16262 |
| 6 | 144476 |
| 7 | 1510446 |
| 8 | 13506023 |
| 9 | 132712481 |
| 10 | 1185979605 |
| 11 | 11264671456 |
| 12 | 100572103736 |
| 13 | 935551716239 |
| 14 | 8347069749600 |
| 15 | 76604373779441 |
| 16 | 683160282998544 |
| 17 | 6213169249692192 |
| 18 | 55392188422262591 |
| 19 | 500676083630457127 |
| 20 | 4462726297606450762 |
| 21 | 40165465812088131228 |
| 22 | 357958181000067374304 |