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 | 1 |
| 2 | 1 |
| 3 | 3 |
| 4 | 3 |
| 5 | 15 |
| 6 | 3 |
| 7 | 63 |
| 8 | 21 |
| 9 | 125 |
| 10 | 36 |
| 11 | 1023 |
| 12 | 25 |
| 13 | 4095 |
| 14 | 314 |
| 15 | 3357 |
| 16 | 987 |
| 17 | 65535 |
| 18 | 207 |
| 19 | 262143 |
| 20 | 2782 |
| 21 | 164498 |
| 22 | 17114 |
| 23 | 4194303 |
| 24 | 1705 |
| 25 | 11349545 |
| 26 | 119620 |
| 27 | 7256527 |
| 28 | 209376 |
| 29 | 268435455 |
| 30 | 1261 |
| 31 | 1073741823 |
| 32 | 2178309 |
| 33 | 276465135 |
| 34 | 5687872 |
| 35 | 8460492865 |
| 36 | 114575 |
| 37 | 68719476735 |