n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 1 |
4 | 4 |
5 | 16 |
6 | 46 |
7 | 106 |
8 | 316 |
9 | 1604 |
10 | 8156 |
11 | 33716 |
12 | 125456 |
13 | 1073216 |
14 | 10233224 |
15 | 69873896 |
16 | 364469561 |
17 | 2296961801 |
18 | 19124734801 |
19 | 147200743489 |
20 | 960313414036 |
21 | 6422446261456 |
22 | 52845891370966 |
23 | 461844834503746 |
24 | 3779922654292324 |
25 | 31131912140021452 |
26 | 296987899271509252 |
[1,1,1,1,4,16,46,106,316,1604,8156,33716,125456, 1073216,10233224,69873896,364469561,2296961801, 19124734801,147200743489,960313414036, 6422446261456,52845891370966,461844834503746, 3779922654292324,31131912140021452, 296987899271509252] |