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 | 1 |
| 3 | 2 |
| 4 | 8 |
| 5 | 38 |
| 6 | 238 |
| 7 | 1558 |
| 8 | 10966 |
| 9 | 106334 |
| 10 | 1050974 |
| 11 | 10295324 |
| 12 | 114643744 |
| 13 | 1426970188 |
| 14 | 19128627772 |
| 15 | 301484330492 |
| 16 | 4785515966492 |
| 17 | 75490216911932 |
| 18 | 1287754035291964 |
| 19 | 23735661951947896 |
| 20 | 462001846720538656 |
| 21 | 9472366452963142856 |
| 22 | 202869898263715663016 |
| 23 | 4536294970208910412232 |
| 24 | 107194755891965843670088 |
| 25 | 2634562640821884269137768 |