n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 5 |
4 | 16 |
5 | 56 |
6 | 333 |
7 | 2147 |
8 | 17456 |
9 | 158022 |
10 | 1604281 |
11 | 17863089 |
12 | 216774585 |
13 | 2844162968 |
14 | 40129498111 |
15 | 605894465441 |
16 | 9748493596584 |
17 | 166520626541070 |
18 | 3009885559478844 |
19 | 57397289146583917 |
20 | 1151666341035710396 |
[1,2,5,16,56,333,2147,17456,158022,1604281, 17863089,216774585,2844162968,40129498111, 605894465441,9748493596584,166520626541070, 3009885559478844,57397289146583917, 1151666341035710396] |