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 | 2 |
| 2 | 17 |
| 3 | 41 |
| 4 | 107 |
| 5 | 251 |
| 6 | 647 |
| 7 | 761 |
| 8 | 1511 |
| 9 | 23327 |
| 10 | 27431 |
| 11 | 139967 |
| 12 | 3145721 |
| 13 | 30233087 |
| 14 | 35551871 |
| 15 | 6530347007 |
| 16 | 39182082047 |
| 17 | 91424858111 |
| 18 | 146766805631 |
| 19 | 6847552083566591 |
| 20 | 153558654482644991 |
| 21 | 246511875008397311 |
| 22 | 14215144014964850687 |