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 | 0 |
| 2 | 2 |
| 3 | 4 |
| 4 | 4 |
| 5 | 16 |
| 6 | 24 |
| 7 | 48 |
| 8 | 112 |
| 9 | 192 |
| 10 | 416 |
| 11 | 832 |
| 12 | 1600 |
| 13 | 3328 |
| 14 | 6528 |
| 15 | 13056 |
| 16 | 26368 |
| 17 | 52224 |
| 18 | 104960 |
| 19 | 209920 |
| 20 | 418816 |
| 21 | 839680 |
| 22 | 1677312 |
| 23 | 3354624 |
| 24 | 6713344 |
| 25 | 13418496 |
| 26 | 26845184 |
| 27 | 53690368 |
| 28 | 107364352 |
| 29 | 214761472 |
| 30 | 429490176 |
| 31 | 858980352 |
| 32 | 1718026240 |
| 33 | 3435921408 |
| 34 | 6871973888 |