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 | 25 |
| 3 | 362 |
| 4 | 3973 |
| 5 | 36646 |
| 6 | 299530 |
| 7 | 2238676 |
| 8 | 15613741 |
| 9 | 103054094 |
| 10 | 650194974 |
| 11 | 3950996556 |
| 12 | 23257207714 |
| 13 | 133217073276 |
| 14 | 745218012084 |
| 15 | 4083224828328 |
| 16 | 21966983072637 |
| 17 | 116268166691358 |
| 18 | 606474982072982 |
| 19 | 3122157367765788 |