n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 22 |
3 | 145 |
4 | 988 |
5 | 6766 |
6 | 46369 |
7 | 317812 |
8 | 2178310 |
9 | 14930353 |
10 | 102334156 |
11 | 701408734 |
12 | 4807526977 |
13 | 32951280100 |
14 | 225851433718 |
15 | 1548008755921 |
16 | 10610209857724 |
17 | 72723460248142 |
18 | 498454011879265 |
19 | 3416454622906708 |
20 | 23416728348467686 |
[1,4,22,145,988,6766,46369,317812,2178310, 14930353,102334156,701408734,4807526977, 32951280100,225851433718,1548008755921, 10610209857724,72723460248142,498454011879265, 3416454622906708,23416728348467686] |