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 | 1 |
| 1 | 60 |
| 2 | 252 |
| 3 | 544 |
| 4 | 1020 |
| 5 | 1560 |
| 6 | 2080 |
| 7 | 3264 |
| 8 | 4092 |
| 9 | 4380 |
| 10 | 6552 |
| 11 | 8160 |
| 12 | 8224 |
| 13 | 10200 |
| 14 | 12480 |
| 15 | 14144 |
| 16 | 16380 |
| 17 | 17400 |
| 18 | 18396 |
| 19 | 24480 |
| 20 | 26520 |
| 21 | 23040 |
| 22 | 31200 |
| 23 | 35904 |
| 24 | 32800 |
| 25 | 39060 |
| 26 | 42840 |
| 27 | 44608 |
| 28 | 49344 |
| 29 | 50520 |
| 30 | 54080 |
| 31 | 65280 |
| 32 | 65532 |
| 33 | 57600 |
| 34 | 73080 |
| 35 | 84864 |
| 36 | 74460 |
| 37 | 82200 |
| 38 | 93600 |
| 39 | 92480 |