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 | 5 |
| 3 | 505 |
| 4 | 5905 |
| 5 | 596405 |
| 6 | 1971005 |
| 7 | 199071505 |
| 8 | 515151005 |
| 9 | 581457505 |
| 10 | 618181105 |
| 11 | 2327756905 |
| 12 | 11855474405 |
| 13 | 19555113485 |
| 14 | 31361954905 |
| 15 | 101901244565 |
| 16 | 235103447405 |
| 17 | 305354088005 |
| 18 | 395331063745 |
| 19 | 600905819065 |
| 20 | 608393336905 |
| 21 | 686701313405 |
| 22 | 730071885005 |