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 | 2667 |
| 4 | 82677 |
| 5 | 1984248 |
| 6 | 40346376 |
| 7 | 698136399 |
| 8 | 10472045985 |
| 9 | 138455313640 |
| 10 | 1633772700952 |
| 11 | 17377481697723 |
| 12 | 167982323077989 |
| 13 | 1485996809606736 |
| 14 | 12100259735369136 |
| 15 | 91155294690805839 |