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 | 2 |
| 2 | 13 |
| 3 | 134 |
| 4 | 167 |
| 5 | 2239 |
| 6 | 62268 |
| 7 | 75255 |
| 8 | 135681 |
| 9 | 439867 |
| 10 | 18139940 |
| 11 | 23671044 |
| 12 | 40892256 |
| 13 | 312083956 |
| 14 | 724031017 |
| 15 | 1990127567 |
| 16 | 2144843867 |
| 17 | 2588619526 |
| 18 | 7439533243 |
| 19 | 15054156002 |
| 20 | 54892225873 |
| 21 | 69959798320 |
| 22 | 79760490898 |
| 23 | 282311798922 |