n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 4 |
4 | 10 |
5 | 26 |
6 | 196 |
7 | 1072 |
8 | 7484 |
9 | 42940 |
10 | 261496 |
11 | 1477136 |
12 | 15219832 |
13 | 134828344 |
14 | 1488515120 |
15 | 13692017536 |
16 | 130252442896 |
17 | 1123580329232 |
18 | 14639510308384 |
19 | 173489066401600 |
20 | 2528654220104096 |
21 | 31472160333513376 |
22 | 402634734214583872 |
23 | 4645625988351336704 |
24 | 25925035549644280991680 |
[1,1,2,4,10,26,196,1072,7484,42940,261496,1477136, 15219832,134828344,1488515120,13692017536, 130252442896,1123580329232,14639510308384, 173489066401600,2528654220104096, 31472160333513376,402634734214583872, 4645625988351336704,25925035549644280991680] |