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 | 18 |
| 2 | 972 |
| 3 | 26244 |
| 4 | 524880 |
| 5 | 8857350 |
| 6 | 133923132 |
| 7 | 1874923848 |
| 8 | 24794911296 |
| 9 | 313810596090 |
| 10 | 3835462841100 |
| 11 | 45565298552268 |
| 12 | 528708092292432 |
| 13 | 6014054549826414 |
| 14 | 67257769817585340 |
| 15 | 741208075540736400 |