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 | 1 |
| 1 | 3 |
| 2 | 5 |
| 3 | 15 |
| 4 | 17 |
| 5 | 51 |
| 6 | 93 |
| 7 | 255 |
| 8 | 257 |
| 9 | 771 |
| 10 | 1453 |
| 11 | 3855 |
| 12 | 4593 |
| 13 | 13299 |
| 14 | 23901 |
| 15 | 65535 |
| 16 | 65537 |
| 17 | 196611 |
| 18 | 371373 |
| 19 | 983055 |
| 20 | 1175281 |
| 21 | 3394803 |
| 22 | 6103645 |
| 23 | 16711935 |
| 24 | 16908033 |
| 25 | 50593539 |
| 26 | 95245741 |
| 27 | 252706575 |
| 28 | 301011441 |
| 29 | 871576563 |
| 30 | 1566432605 |
| 31 | 4294967295 |