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 | 28 |
| 2 | 784 |
| 3 | 12752 |
| 4 | 139925 |
| 5 | 1147712 |
| 6 | 7526024 |
| 7 | 41334135 |
| 8 | 196691651 |
| 9 | 831996762 |
| 10 | 3191126598 |
| 11 | 11273703656 |
| 12 | 37147879480 |
| 13 | 115325935123 |
| 14 | 340079259419 |
| 15 | 958837466287 |
| 16 | 2598467396144 |
| 17 | 6797368250655 |
| 18 | 17222433541791 |
| 19 | 42380526618210 |