n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 4 |
4 | 28 |
5 | 302 |
6 | 4776 |
7 | 106732 |
8 | 3249352 |
9 | 131290812 |
10 | 6922560160 |
11 | 470586936176 |
12 | 40833342324864 |
13 | 4482709905772936 |
14 | 617622136930640128 |
15 | 106013904370382120400 |
16 | 22516967955697072408576 |
17 | 5880701545642715236590608 |
18 | 1877504184190590494772860928 |
[1,1,4,28,302,4776,106732,3249352,131290812, 6922560160,470586936176,40833342324864, 4482709905772936,617622136930640128, 106013904370382120400,22516967955697072408576, 5880701545642715236590608, 1877504184190590494772860928] |