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 | 42 |
| 2 | 1064 |
| 3 | 21168 |
| 4 | 365232 |
| 5 | 5743584 |
| 6 | 84713728 |
| 7 | 1193127936 |
| 8 | 16239711488 |
| 9 | 215394955776 |
| 10 | 2800564795392 |
| 11 | 35851775791104 |
| 12 | 453374980255744 |
| 13 | 5677724481773568 |
| 14 | 70550796621971456 |
| 15 | 871159544637161472 |