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 | 21 |
| 2 | 441 |
| 3 | 4705 |
| 4 | 45932 |
| 5 | 382349 |
| 6 | 3032756 |
| 7 | 22816988 |
| 8 | 167677230 |
| 9 | 1207025216 |
| 10 | 8591341603 |
| 11 | 60610129084 |
| 12 | 425271661995 |
| 13 | 2971839865977 |
| 14 | 20712555115779 |
| 15 | 144081095381243 |
| 16 | 1000955841121092 |
| 17 | 6947328909618473 |
| 18 | 48188215073760186 |