n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 4 |
4 | 19 |
5 | 91 |
6 | 476 |
7 | 2586 |
8 | 14421 |
9 | 82225 |
10 | 476913 |
11 | 2804880 |
12 | 16689036 |
13 | 100276894 |
14 | 607588840 |
15 | 3708251888 |
16 | 22776251835 |
17 | 140676848445 |
18 | 873210347555 |
19 | 5444307431052 |
20 | 34080036632565 |
21 | 214104150405915 |
22 | 1349504948018208 |
23 | 8531467913710560 |
24 | 54083412667272300 |
25 | 343715994386622918 |
26 | 2189505804590364876 |
[1,1,1,4,19,91,476,2586,14421,82225,476913, 2804880,16689036,100276894,607588840,3708251888, 22776251835,140676848445,873210347555, 5444307431052,34080036632565,214104150405915, 1349504948018208,8531467913710560, 54083412667272300,343715994386622918, 2189505804590364876] |