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 | 2 |
| 1 | 4 |
| 2 | 8 |
| 3 | 16 |
| 4 | 48 |
| 5 | 80 |
| 6 | 288 |
| 7 | 512 |
| 8 | 1536 |
| 9 | 2816 |
| 10 | 9472 |
| 11 | 16128 |
| 12 | 58880 |
| 13 | 103424 |
| 14 | 337920 |
| 15 | 606208 |
| 16 | 2113536 |
| 17 | 3620864 |
| 18 | 13303808 |
| 19 | 23265280 |
| 20 | 78905344 |
| 21 | 140181504 |
| 22 | 497352704 |
| 23 | 854523904 |
| 24 | 3150839808 |
| 25 | 5497421824 |
| 26 | 19039518720 |
| 27 | 33639366656 |