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 | 22 |
| 2 | 484 |
| 3 | 5600 |
| 4 | 42090 |
| 5 | 237088 |
| 6 | 1082738 |
| 7 | 4207089 |
| 8 | 14362171 |
| 9 | 44066468 |
| 10 | 123591226 |
| 11 | 321014080 |
| 12 | 780210492 |
| 13 | 1789329904 |
| 14 | 3899021174 |
| 15 | 8119048135 |
| 16 | 16234703963 |
| 17 | 31301451138 |
| 18 | 58398476624 |
| 19 | 105750499888 |
| 20 | 186363500950 |
| 21 | 320365509352 |