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 | 442 |
| 7 | 14960 |
| 8 | 174471 |
| 9 | 1478048 |
| 10 | 9546537 |
| 11 | 46699952 |
| 12 | 175078410 |
| 13 | 509477760 |
| 14 | 1160564636 |
| 15 | 2081169376 |
| 16 | 2949602799 |
| 17 | 3312254400 |
| 18 | 2949602799 |
| 19 | 2081169376 |
| 20 | 1160564636 |
| 21 | 509477760 |
| 22 | 175078410 |
| 23 | 46699952 |
| 24 | 9546537 |
| 25 | 1478048 |
| 26 | 174471 |
| 27 | 14960 |
| 28 | 442 |
| 29 | 0 |
| 30 | 0 |
| 31 | 0 |
| 32 | 0 |
| 33 | 0 |
| 34 | 1 |