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 | 40 |
| 3 | 32 |
| 4 | 272 |
| 5 | 160 |
| 6 | 888 |
| 7 | 448 |
| 8 | 2080 |
| 9 | 960 |
| 10 | 4040 |
| 11 | 1760 |
| 12 | 6960 |
| 13 | 2912 |
| 14 | 11032 |
| 15 | 4480 |
| 16 | 16448 |
| 17 | 6528 |
| 18 | 23400 |
| 19 | 9120 |
| 20 | 32080 |
| 21 | 12320 |
| 22 | 42680 |
| 23 | 16192 |
| 24 | 55392 |
| 25 | 20800 |
| 26 | 70408 |
| 27 | 26208 |
| 28 | 87920 |
| 29 | 32480 |
| 30 | 108120 |
| 31 | 39680 |
| 32 | 131200 |
| 33 | 47872 |
| 34 | 157352 |
| 35 | 57120 |
| 36 | 186768 |
| 37 | 67488 |
| 38 | 219640 |
| 39 | 79040 |
| 40 | 256160 |