n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 4 |
4 | 22 |
5 | 184 |
6 | 2278 |
7 | 37076 |
8 | 747830 |
9 | 17938120 |
10 | 498221046 |
11 | 15716127456 |
12 | 554857740936 |
13 | 21672428437044 |
14 | 927792029298550 |
15 | 43195423181912812 |
16 | 2172838098801762500 |
17 | 117433517088859845912 |
18 | 6786305674234003471552 |
19 | 417560119759063983102136 |
20 | 27254276361313006814819076 |
[1,1,2,4,22,184,2278,37076,747830,17938120, 498221046,15716127456,554857740936,21672428437044, 927792029298550,43195423181912812, 2172838098801762500,117433517088859845912, 6786305674234003471552,417560119759063983102136, 27254276361313006814819076] |