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) |
|---|---|
| 8 | 1 |
| 9 | 3 |
| 10 | 6 |
| 11 | 12 |
| 12 | 24 |
| 13 | 42 |
| 14 | 76 |
| 15 | 136 |
| 16 | 240 |
| 17 | 424 |
| 18 | 753 |
| 19 | 1337 |
| 20 | 2388 |
| 21 | 4280 |
| 22 | 7706 |
| 23 | 13940 |
| 24 | 25332 |
| 25 | 46224 |
| 26 | 84696 |
| 27 | 155786 |
| 28 | 287574 |
| 29 | 532624 |
| 30 | 989554 |
| 31 | 1843744 |
| 32 | 3444389 |
| 33 | 6450369 |
| 34 | 12107004 |
| 35 | 22771642 |
| 36 | 42913116 |
| 37 | 81014528 |
| 38 | 153199818 |
| 39 | 290152952 |
| 40 | 550332614 |
| 41 | 1045234672 |
| 42 | 1987731140 |