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 | 11 |
| 6 | 9 |
| 7 | 7 |
| 8 | 73 |
| 9 | 59 |
| 10 | 181 |
| 11 | 483 |
| 12 | 657 |
| 13 | 1871 |
| 14 | 3729 |
| 15 | 7027 |
| 16 | 16813 |
| 17 | 32699 |
| 18 | 68761 |
| 19 | 149463 |
| 20 | 301017 |
| 21 | 642731 |
| 22 | 1349349 |
| 23 | 2790547 |
| 24 | 5912353 |
| 25 | 12327839 |
| 26 | 25777441 |
| 27 | 54217443 |
| 28 | 113194077 |
| 29 | 237322091 |
| 30 | 497475369 |
| 31 | 1040614567 |
| 32 | 2181561193 |