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 | 1 |
| 2 | 9 |
| 3 | 75 |
| 4 | 2205 |
| 5 | 25515 |
| 6 | 1715175 |
| 7 | 79053975 |
| 8 | 9577693125 |
| 9 | 184530220875 |
| 10 | 35266981624875 |
| 11 | 4092826025413125 |
| 12 | 66711917764366875 |
| 13 | 92454016466921484375 |
| 14 | 35047468562280596296875 |
| 15 | 7641646200968365570359375 |
| 16 | 3798425171964103092990703125 |
| 17 | 133435000395771234460221796875 |