n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 9 |
4 | 88 |
5 | 210 |
6 | 2644 |
7 | 6493 |
8 | 91992 |
9 | 229646 |
10 | 3484008 |
11 | 8789562 |
12 | 139443168 |
13 | 354379540 |
14 | 5801987316 |
15 | 14824740645 |
16 | 248459660984 |
17 | 637465292438 |
18 | 10878564788984 |
19 | 28001827694446 |
20 | 484778825103504 |
21 | 1251132971284668 |
22 | 21915195896364296 |
23 | 56682787977509650 |
24 | 1002570518541796720 |
[1,1,4,9,88,210,2644,6493,91992,229646,3484008, 8789562,139443168,354379540,5801987316, 14824740645,248459660984,637465292438, 10878564788984,28001827694446,484778825103504, 1251132971284668,21915195896364296, 56682787977509650,1002570518541796720] |