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) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 9 |
| 3 | 15 |
| 4 | 271 |
| 5 | 313 |
| 6 | 481 |
| 7 | 511 |
| 8 | 33279 |
| 9 | 34785 |
| 10 | 39993 |
| 11 | 40719 |
| 12 | 61455 |
| 13 | 61689 |
| 14 | 65409 |
| 15 | 65535 |
| 16 | 16842751 |
| 17 | 17039233 |
| 18 | 17809657 |
| 19 | 17821711 |
| 20 | 20455183 |
| 21 | 20479033 |
| 22 | 20842465 |
| 23 | 20939263 |
| 24 | 31457791 |
| 25 | 31465441 |
| 26 | 31584313 |
| 27 | 31588111 |
| 28 | 33488911 |
| 29 | 33489913 |
| 30 | 33553921 |
| 31 | 33554431 |
| 32 | 34393292799 |