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 | 3 |
| 3 | 7 |
| 4 | 7 |
| 5 | 23 |
| 6 | 23 |
| 7 | 23 |
| 8 | 151 |
| 9 | 407 |
| 10 | 407 |
| 11 | 1431 |
| 12 | 3479 |
| 13 | 3479 |
| 14 | 11671 |
| 15 | 11671 |
| 16 | 44439 |
| 17 | 109975 |
| 18 | 241047 |
| 19 | 503191 |
| 20 | 1027479 |
| 21 | 2076055 |
| 22 | 2076055 |
| 23 | 6270359 |
| 24 | 6270359 |
| 25 | 6270359 |
| 26 | 6270359 |
| 27 | 6270359 |
| 28 | 6270359 |
| 29 | 274705815 |
| 30 | 811576727 |
| 31 | 1885318551 |
| 32 | 1885318551 |
| 33 | 6180285847 |