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 | 2 |
| 2 | 3 |
| 3 | 3 |
| 4 | 3 |
| 5 | 21 |
| 6 | 21 |
| 7 | 75 |
| 8 | 75 |
| 9 | 151 |
| 10 | 151 |
| 11 | 1365 |
| 12 | 1365 |
| 13 | 5461 |
| 14 | 5461 |
| 15 | 14563 |
| 16 | 14563 |
| 17 | 87381 |
| 18 | 87381 |
| 19 | 184111 |
| 20 | 184111 |
| 21 | 932067 |
| 22 | 932067 |
| 23 | 5592405 |
| 24 | 5592405 |
| 25 | 13256071 |
| 26 | 13256071 |
| 27 | 26512143 |
| 28 | 26512143 |
| 29 | 357913941 |
| 30 | 357913941 |
| 31 | 1431655765 |
| 32 | 1431655765 |
| 33 | 3817748707 |