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) |
|---|---|
| 6 | 120 |
| 7 | 1575 |
| 8 | 10080 |
| 9 | 44380 |
| 10 | 154000 |
| 11 | 451990 |
| 12 | 1170400 |
| 13 | 2748460 |
| 14 | 5965960 |
| 15 | 12137125 |
| 16 | 23383360 |
| 17 | 43006600 |
| 18 | 75988640 |
| 19 | 129645740 |
| 20 | 214472000 |
| 21 | 345209480 |
| 22 | 542187800 |
| 23 | 832980995 |
| 24 | 1254434720 |
| 25 | 1855122500 |
| 26 | 2698295600 |
| 27 | 3865397250 |
| 28 | 5460218400 |
| 29 | 7613778900 |
| 30 | 10490025000 |