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 | 2 |
| 3 | 6 |
| 4 | 24 |
| 5 | 24 |
| 6 | 72 |
| 7 | 144 |
| 8 | 1152 |
| 9 | 1296 |
| 10 | 2304 |
| 11 | 6912 |
| 12 | 82944 |
| 13 | 82944 |
| 14 | 165888 |
| 15 | 497664 |
| 16 | 7962624 |
| 17 | 15925248 |
| 18 | 47775744 |
| 19 | 191102976 |
| 20 | 191102976 |
| 21 | 573308928 |
| 22 | 1146617856 |
| 23 | 13759414272 |
| 24 | 13759414272 |
| 25 | 27518828544 |
| 26 | 82556485632 |