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 | 13 |
| 3 | 181 |
| 4 | 2413 |
| 5 | 40065 |
| 6 | 606201 |
| 7 | 9557077 |
| 8 | 150278792 |
| 9 | 2367212857 |
| 10 | 37358187521 |
| 11 | 589449930573 |
| 12 | 9305507958493 |
| 13 | 146913309982185 |
| 14 | 2319624020512093 |
| 15 | 36626205645266813 |
| 16 | 578327113990185529 |
| 17 | 9131891816444663056 |