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) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 5 |
| 4 | 6 |
| 5 | 226 |
| 6 | 1072 |
| 7 | 255088 |
| 8 | 4638576 |
| 9 | 6663430912 |
| 10 | 467260456608 |
| 11 | 3916162476483538 |
| 12 | 1076226888605605706 |
| 13 | 51249820944023435573470 |
| 14 | 56126499620491437281263608 |
| 15 | 14870957102232406137455708164254 |
| 16 | 65882516522625836326159786165530572 |
| 17 | 95494789899510664733921727510895952184006 |