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 | 1 |
| 2 | 11 |
| 3 | 197 |
| 4 | 4593 |
| 5 | 126289 |
| 6 | 3888343 |
| 7 | 130016393 |
| 8 | 4629617873 |
| 9 | 173225211953 |
| 10 | 6746427428131 |
| 11 | 271578345652109 |
| 12 | 11240106619304609 |
| 13 | 476332107976984545 |
| 14 | 20601333127791572143 |
| 15 | 906951532759564554769 |
| 16 | 40554743852511698293601 |