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 | 0 |
| 1 | 0 |
| 2 | 3 |
| 3 | 12 |
| 4 | 30 |
| 5 | 60 |
| 6 | 105 |
| 7 | 168 |
| 8 | 252 |
| 9 | 360 |
| 10 | 495 |
| 11 | 660 |
| 12 | 858 |
| 13 | 1092 |
| 14 | 1365 |
| 15 | 1680 |
| 16 | 2040 |
| 17 | 2448 |
| 18 | 2907 |
| 19 | 3420 |
| 20 | 3990 |
| 21 | 4620 |
| 22 | 5313 |
| 23 | 6072 |
| 24 | 6900 |
| 25 | 7800 |
| 26 | 8775 |
| 27 | 9828 |
| 28 | 10962 |
| 29 | 12180 |
| 30 | 13485 |
| 31 | 14880 |
| 32 | 16368 |
| 33 | 17952 |
| 34 | 19635 |
| 35 | 21420 |
| 36 | 23310 |
| 37 | 25308 |
| 38 | 27417 |
| 39 | 29640 |
| 40 | 31980 |
| 41 | 34440 |