n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 4 |
4 | 14 |
5 | 92 |
6 | 884 |
7 | 11200 |
8 | 175460 |
9 | 3264456 |
10 | 70251004 |
11 | 1715832180 |
12 | 46881727360 |
13 | 1416695166888 |
14 | 46909359288468 |
15 | 1688908328539092 |
16 | 65689047712686678 |
17 | 2744769306400145168 |
18 | 122618498876673122160 |
19 | 5832010466617354498700 |
20 | 294228096306408399225374 |
[1,1,2,4,14,92,884,11200,175460,3264456,70251004, 1715832180,46881727360,1416695166888, 46909359288468,1688908328539092,65689047712686678, 2744769306400145168,122618498876673122160, 5832010466617354498700,294228096306408399225374] |