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 | 0 |
| 6 | 1 |
| 7 | 1 |
| 8 | 1 |
| 9 | 1 |
| 10 | 1 |
| 11 | 1 |
| 12 | 925 |
| 13 | 3433 |
| 14 | 9439 |
| 15 | 22881 |
| 16 | 51767 |
| 17 | 112269 |
| 18 | 17390049 |
| 19 | 140166497 |
| 20 | 749266977 |
| 21 | 3311021321 |
| 22 | 13091222301 |
| 23 | 48138992687 |
| 24 | 2477067794573 |
| 25 | 33549609515571 |
| 26 | 292811657874791 |
| 27 | 2040445353211231 |
| 28 | 12382874543793451 |
| 29 | 68436110449556971 |