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 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 1 |
| 6 | 1 |
| 7 | 1 |
| 8 | 1 |
| 9 | 1 |
| 10 | 1 |
| 11 | 7 |
| 12 | 98 |
| 13 | 575 |
| 14 | 2009 |
| 15 | 5468 |
| 16 | 13365 |
| 17 | 30910 |
| 18 | 70156 |
| 19 | 170830 |
| 20 | 531334 |
| 21 | 2203895 |
| 22 | 10091063 |
| 23 | 44034478 |
| 24 | 176213307 |
| 25 | 650957418 |
| 26 | 2258314543 |
| 27 | 7491190627 |
| 28 | 24204620623 |
| 29 | 77794583961 |
| 30 | 254583038843 |
| 31 | 865776314524 |
| 32 | 3087754003802 |
| 33 | 11479621448305 |