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 | 4 |
| 3 | 9 |
| 4 | 121 |
| 5 | 301 |
| 6 | 441 |
| 7 | 468 |
| 8 | 3171 |
| 9 | 8373 |
| 10 | 13440 |
| 11 | 16641 |
| 12 | 16804 |
| 13 | 83161 |
| 14 | 100652 |
| 15 | 133200 |
| 16 | 367428 |
| 17 | 395640 |
| 18 | 459680 |
| 19 | 701823 |
| 20 | 3739690 |
| 21 | 4238314 |
| 22 | 6698616 |
| 23 | 9014248 |
| 24 | 12301860 |
| 25 | 16956850 |
| 26 | 22230514 |
| 27 | 54889200 |
| 28 | 60676144 |
| 29 | 84983056 |
| 30 | 116648892 |
| 31 | 128942664 |