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) |
|---|---|
| 3 | 0 |
| 4 | 2 |
| 5 | 0 |
| 6 | 0 |
| 7 | 12 |
| 8 | 38 |
| 9 | 0 |
| 10 | 0 |
| 11 | 1172 |
| 12 | 0 |
| 13 | 14572 |
| 14 | 52536 |
| 15 | 0 |
| 16 | 0 |
| 17 | 2581112 |
| 18 | 0 |
| 19 | 35791472 |
| 20 | 0 |
| 21 | 0 |
| 22 | 1908889156 |
| 23 | 0 |
| 24 | 0 |
| 25 | 399822600756 |
| 26 | 5864062716964 |
| 27 | 22517998136936 |
| 28 | 0 |
| 29 | 0 |
| 30 | 333599972407532 |
| 31 | 1286742760265468 |
| 32 | 0 |
| 33 | 0 |
| 34 | 4340410370789890656 |
| 35 | 0 |
| 36 | 255263053128088930472 |
| 37 | 0 |