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 | 2 |
| 1 | 5 |
| 2 | 37 |
| 3 | 193 |
| 4 | 2161 |
| 5 | 23041 |
| 6 | 241921 |
| 7 | 2903041 |
| 8 | 55987201 |
| 9 | 958003201 |
| 10 | 17915904001 |
| 11 | 250822656001 |
| 12 | 5518098432001 |
| 13 | 142216445952001 |
| 14 | 2897001676800001 |
| 15 | 90386452316160001 |
| 16 | 1807729046323200001 |
| 17 | 52563198423859200001 |