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 | 2 |
| 2 | 3 |
| 3 | 6 |
| 4 | 24 |
| 5 | 40 |
| 6 | 76 |
| 7 | 152 |
| 8 | 672 |
| 9 | 1088 |
| 10 | 2208 |
| 11 | 4416 |
| 12 | 20224 |
| 13 | 32384 |
| 14 | 67776 |
| 15 | 135552 |
| 16 | 632320 |
| 17 | 1006592 |
| 18 | 2144768 |
| 19 | 4289536 |
| 20 | 20238336 |
| 21 | 32100352 |
| 22 | 69203968 |
| 23 | 138407936 |
| 24 | 658079744 |
| 25 | 1041203200 |
| 26 | 2263351296 |
| 27 | 4526702592 |
| 28 | 21643526144 |
| 29 | 34182430720 |