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 | 3 |
| 2 | 24 |
| 3 | 243 |
| 4 | 2973 |
| 5 | 41676 |
| 6 | 652662 |
| 7 | 11228556 |
| 8 | 209674050 |
| 9 | 4211011422 |
| 10 | 90309000630 |
| 11 | 2056139084544 |
| 12 | 49460437075896 |
| 13 | 1251936022103679 |
| 14 | 33228751234896060 |
| 15 | 922028391785300940 |
| 16 | 26676362307801924057 |
| 17 | 802875670635086298600 |