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) |
|---|---|
| 3 | 105 |
| 4 | 8112 |
| 5 | 396792 |
| 6 | 15663360 |
| 7 | 544475232 |
| 8 | 17388675072 |
| 9 | 522638463744 |
| 10 | 15007609257984 |
| 11 | 415870219556352 |
| 12 | 11199568168353792 |
| 13 | 294628320168579072 |
| 14 | 7600751972236394496 |
| 15 | 192860109239084236800 |
| 16 | 4824494454867178291200 |
| 17 | 119207140785929743368192 |
| 18 | 2913796518104633469566976 |