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) |
|---|---|
| 4 | 36 |
| 5 | 994 |
| 6 | 22250 |
| 7 | 484840 |
| 8 | 10867381 |
| 9 | 255929070 |
| 10 | 6387031115 |
| 11 | 169414005231 |
| 12 | 4777275646776 |
| 13 | 143057565908871 |
| 14 | 4541154155493688 |
| 15 | 152488745763476252 |
| 16 | 5404684397262874216 |
| 17 | 201748737356125542014 |
| 18 | 7914700977349228045674 |
| 19 | 325655486028026921305660 |
| 20 | 14026432243484139930962641 |