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 | 1 |
| 2 | 0 |
| 3 | 4 |
| 4 | 5 |
| 5 | 15 |
| 6 | 28 |
| 7 | 60 |
| 8 | 117 |
| 9 | 230 |
| 10 | 440 |
| 11 | 834 |
| 12 | 1560 |
| 13 | 2891 |
| 14 | 5310 |
| 15 | 9680 |
| 16 | 17527 |
| 17 | 31545 |
| 18 | 56468 |
| 19 | 100590 |
| 20 | 178395 |
| 21 | 315106 |
| 22 | 554530 |
| 23 | 972564 |
| 24 | 1700400 |
| 25 | 2964325 |
| 26 | 5153868 |
| 27 | 8938300 |
| 28 | 15465497 |
| 29 | 26700915 |
| 30 | 46004620 |
| 31 | 79112304 |
| 32 | 135801105 |
| 33 | 232715006 |
| 34 | 398151740 |