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 | 4 |
| 2 | 16 |
| 3 | 44 |
| 4 | 110 |
| 5 | 236 |
| 6 | 472 |
| 7 | 868 |
| 8 | 1519 |
| 9 | 2520 |
| 10 | 4032 |
| 11 | 6216 |
| 12 | 9324 |
| 13 | 13608 |
| 14 | 19440 |
| 15 | 27192 |
| 16 | 37389 |
| 17 | 50556 |
| 18 | 67408 |
| 19 | 88660 |
| 20 | 115258 |
| 21 | 148148 |
| 22 | 188552 |
| 23 | 237692 |
| 24 | 297115 |
| 25 | 368368 |
| 26 | 453376 |
| 27 | 554064 |
| 28 | 672792 |
| 29 | 811920 |
| 30 | 974304 |
| 31 | 1162800 |
| 32 | 1380825 |
| 33 | 1631796 |