n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 4 |
3 | 14 |
4 | 56 |
5 | 256 |
6 | 1324 |
7 | 7664 |
8 | 49136 |
9 | 345856 |
10 | 2652244 |
11 | 22014464 |
12 | 196658216 |
13 | 1881389056 |
14 | 19192151164 |
15 | 207961585664 |
16 | 2385488163296 |
17 | 28879019769856 |
18 | 367966308562084 |
19 | 4922409168011264 |
20 | 68978503204900376 |
21 | 1010472388453728256 |
22 | 15445185289163949004 |
[0,1,4,14,56,256,1324,7664,49136,345856,2652244, 22014464,196658216,1881389056,19192151164, 207961585664,2385488163296,28879019769856, 367966308562084,4922409168011264, 68978503204900376,1010472388453728256, 15445185289163949004] |