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 | 13 |
| 2 | 180 |
| 3 | 2460 |
| 4 | 18060 |
| 5 | 332640 |
| 6 | 3548160 |
| 7 | 37837800 |
| 8 | 311351040 |
| 9 | 3455131680 |
| 10 | 32639967360 |
| 11 | 479785466160 |
| 12 | 3379449593520 |
| 13 | 44734582292400 |
| 14 | 527257688958000 |
| 15 | 3493634344200000 |
| 16 | 31840983413038800 |
| 17 | 408373247583100800 |