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) |
|---|---|
| 1 | 0 |
| 2 | 2 |
| 3 | 12 |
| 4 | 28 |
| 5 | 100 |
| 6 | 90 |
| 7 | 392 |
| 8 | 408 |
| 9 | 792 |
| 10 | 810 |
| 11 | 2420 |
| 12 | 1356 |
| 13 | 4732 |
| 14 | 3346 |
| 15 | 4560 |
| 16 | 6320 |
| 17 | 13872 |
| 18 | 7506 |
| 19 | 21660 |
| 20 | 12140 |
| 21 | 18900 |
| 22 | 21802 |
| 23 | 46552 |
| 24 | 22008 |
| 25 | 53000 |
| 26 | 43290 |
| 27 | 61668 |
| 28 | 49980 |
| 29 | 117740 |
| 30 | 48450 |
| 31 | 153760 |
| 32 | 100192 |
| 33 | 123552 |
| 34 | 129506 |
| 35 | 169260 |
| 36 | 111420 |
| 37 | 312132 |
| 38 | 203642 |
| 39 | 245544 |
| 40 | 195640 |