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 | 60 |
| 2 | 504 |
| 3 | 1716 |
| 4 | 4080 |
| 5 | 7980 |
| 6 | 13800 |
| 7 | 21924 |
| 8 | 32736 |
| 9 | 46620 |
| 10 | 63960 |
| 11 | 85140 |
| 12 | 110544 |
| 13 | 140556 |
| 14 | 175560 |
| 15 | 215940 |
| 16 | 262080 |
| 17 | 314364 |
| 18 | 373176 |
| 19 | 438900 |
| 20 | 511920 |
| 21 | 592620 |
| 22 | 681384 |
| 23 | 778596 |
| 24 | 884640 |
| 25 | 999900 |
| 26 | 1124760 |
| 27 | 1259604 |
| 28 | 1404816 |
| 29 | 1560780 |
| 30 | 1727880 |
| 31 | 1906500 |