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 | 0 |
| 1 | 2 |
| 2 | 8 |
| 3 | 24 |
| 4 | 56 |
| 5 | 120 |
| 6 | 252 |
| 7 | 476 |
| 8 | 880 |
| 9 | 1584 |
| 10 | 2740 |
| 11 | 4620 |
| 12 | 7680 |
| 13 | 12428 |
| 14 | 19824 |
| 15 | 31170 |
| 16 | 48224 |
| 17 | 73678 |
| 18 | 111384 |
| 19 | 166364 |
| 20 | 246120 |
| 21 | 360822 |
| 22 | 524216 |
| 23 | 755504 |
| 24 | 1080912 |
| 25 | 1535050 |
| 26 | 2165592 |
| 27 | 3036096 |
| 28 | 4230632 |
| 29 | 5861828 |
| 30 | 8078820 |
| 31 | 11076362 |
| 32 | 15112384 |
| 33 | 20523492 |
| 34 | 27747128 |