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 | 4 |
| 3 | 26 |
| 4 | 32 |
| 5 | 58 |
| 6 | 1361 |
| 7 | 4767 |
| 8 | 22303 |
| 9 | 134563 |
| 10 | 188609 |
| 11 | 282816 |
| 12 | 979804 |
| 13 | 1272032 |
| 14 | 1330628 |
| 15 | 3719474 |
| 16 | 5039143 |
| 17 | 12531368 |
| 18 | 435451235 |
| 19 | 5391276884 |
| 20 | 6140156718 |
| 21 | 24140682996 |
| 22 | 30267765913 |
| 23 | 56443830660 |
| 24 | 176797839116 |
| 25 | 645251112512 |