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) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 0 |
| 6 | 1 |
| 7 | 0 |
| 8 | 9 |
| 9 | 2 |
| 10 | 19 |
| 11 | 6 |
| 12 | 76 |
| 13 | 0 |
| 14 | 157 |
| 15 | 113 |
| 16 | 1031 |
| 17 | 0 |
| 18 | 2506 |
| 19 | 0 |
| 20 | 13321 |
| 21 | 4204 |
| 22 | 35246 |
| 23 | 3924 |
| 24 | 158464 |
| 25 | 21623 |
| 26 | 430391 |
| 27 | 283774 |
| 28 | 1854971 |
| 29 | 52648 |
| 30 | 5553234 |
| 31 | 0 |
| 32 | 33556537 |
| 33 | 18428119 |
| 34 | 83562231 |
| 35 | 18807137 |
| 36 | 436801680 |
| 37 | 8328278 |
| 38 | 1205614037 |