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 | 6 |
| 3 | 10 |
| 4 | 5 |
| 5 | 84 |
| 6 | 84 |
| 7 | 1716 |
| 8 | 858 |
| 9 | 286 |
| 10 | 286 |
| 11 | 100776 |
| 12 | 100776 |
| 13 | 891480 |
| 14 | 891480 |
| 15 | 891480 |
| 16 | 445740 |
| 17 | 282861360 |
| 18 | 282861360 |
| 19 | 550835280 |
| 20 | 550835280 |
| 21 | 550835280 |
| 22 | 550835280 |
| 23 | 42222721680 |
| 24 | 42222721680 |
| 25 | 8444544336 |
| 26 | 8444544336 |
| 27 | 2814848112 |
| 28 | 2814848112 |