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 | 120 |
| 3 | 240 |
| 4 | 480 |
| 5 | 680 |
| 6 | 1040 |
| 7 | 1320 |
| 8 | 1800 |
| 9 | 2160 |
| 10 | 2760 |
| 11 | 3200 |
| 12 | 80 |
| 13 | 4440 |
| 14 | 5280 |
| 15 | 120 |
| 16 | 6840 |
| 17 | 7520 |
| 18 | 8600 |
| 19 | 9360 |
| 20 | 10560 |
| 21 | 11400 |
| 22 | 12720 |
| 23 | 13640 |
| 24 | 15080 |
| 25 | 16080 |
| 26 | 360 |
| 27 | 18720 |
| 28 | 20400 |
| 29 | 440 |
| 30 | 23360 |
| 31 | 24600 |
| 32 | 26520 |
| 33 | 27840 |
| 34 | 29880 |
| 35 | 31280 |
| 36 | 33440 |
| 37 | 34920 |
| 38 | 37200 |
| 39 | 38760 |
| 40 | 120 |