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 | 1 |
| 2 | 8 |
| 3 | 147 |
| 4 | 5824 |
| 5 | 405845 |
| 6 | 43733976 |
| 7 | 6726601063 |
| 8 | 1398047697152 |
| 9 | 377278848390249 |
| 10 | 128228860181918440 |
| 11 | 53585748788874537851 |
| 12 | 27001973543813627400768 |
| 13 | 16144773936121968789213757 |
| 14 | 11300021011239061076228900024 |
| 15 | 9152162639827097780662174019535 |