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 | 2 |
| 3 | 175 |
| 4 | 702 |
| 5 | 877 |
| 6 | 1579 |
| 7 | 2456 |
| 8 | 11403 |
| 9 | 595412 |
| 10 | 1202227 |
| 11 | 1797639 |
| 12 | 98274733 |
| 13 | 198347105 |
| 14 | 1883398678 |
| 15 | 2081745783 |
| 16 | 6046890244 |
| 17 | 8128636027 |
| 18 | 22304162298 |
| 19 | 75041122921 |
| 20 | 922797637350 |
| 21 | 997838760271 |
| 22 | 1920636397621 |
| 23 | 4839111555513 |
| 24 | 11598859508647 |
| 25 | 16437971064160 |