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 | 8 |
| 3 | 57 |
| 4 | 568 |
| 5 | 6077 |
| 6 | 69784 |
| 7 | 833253 |
| 8 | 10259448 |
| 9 | 129245091 |
| 10 | 1658145128 |
| 11 | 21589248803 |
| 12 | 284548542120 |
| 13 | 3789094334455 |
| 14 | 50900085245304 |
| 15 | 688944374917247 |
| 16 | 9386664978851448 |
| 17 | 128633790260673263 |
| 18 | 1771859642698543096 |
| 19 | 24518513933529549357 |
| 20 | 340679786167936420216 |