n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 5 |
4 | 14 |
5 | 94 |
6 | 444 |
7 | 3828 |
8 | 25584 |
9 | 270576 |
10 | 2342880 |
11 | 29400480 |
12 | 312888960 |
13 | 4546558080 |
14 | 57424792320 |
15 | 948550176000 |
16 | 13869128448000 |
17 | 256697973504000 |
18 | 4264876094976000 |
19 | 87435019510272000 |
20 | 1627055289796608000 |
21 | 36601063093905408000 |
22 | 754132445894209536000 |
[1,1,5,14,94,444,3828,25584,270576,2342880, 29400480,312888960,4546558080,57424792320, 948550176000,13869128448000,256697973504000, 4264876094976000,87435019510272000, 1627055289796608000,36601063093905408000, 754132445894209536000] |