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 | 0 |
| 1 | 0 |
| 2 | 8 |
| 3 | 156 |
| 4 | 3942 |
| 5 | 154100 |
| 6 | 9414312 |
| 7 | 878218390 |
| 8 | 122207682476 |
| 9 | 24890747805972 |
| 10 | 7307450298831718 |
| 11 | 3053521546328889460 |
| 12 | 1797003559223742679800 |
| 13 | 1476062693867018935173990 |
| 14 | 1679239558149570227773844452 |
| 15 | 2628225174143857306613215434524 |
| 16 | 5626175867513779058706923151723150 |