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) |
|---|---|
| 2 | 2047 |
| 3 | 15841 |
| 4 | 703 |
| 5 | 800605 |
| 6 | 8911 |
| 7 | 341 |
| 8 | 293609485 |
| 9 | 152551 |
| 10 | 4371 |
| 11 | 781 |
| 12 | 10761055201 |
| 13 | 41341321 |
| 14 | 129921 |
| 15 | 24211 |
| 16 | 217 |
| 17 | 5478598723585 |
| 18 | 12283706701 |
| 19 | 9224391 |
| 20 | 4382191 |
| 21 | 29341 |
| 22 | 325 |
| 23 | 713808066913201 |
| 24 | 1064404682551 |
| 25 | 2592053871 |
| 26 | 381347461 |
| 27 | 3405961 |
| 28 | 58825 |
| 29 | 65 |
| 30 | 90614118359482705 |