n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 3 |
4 | 19 |
5 | 155 |
6 | 1641 |
7 | 21427 |
8 | 334377 |
9 | 6085683 |
10 | 126745435 |
11 | 2975448641 |
12 | 77779634571 |
13 | 2241339267037 |
14 | 70604384569005 |
15 | 2414086713172695 |
16 | 89049201691604881 |
17 | 3525160713653081279 |
18 | 149075374211881719939 |
19 | 6707440248292609651513 |
20 | 319946143503599791200675 |
[0,1,3,19,155,1641,21427,334377,6085683,126745435, 2975448641,77779634571,2241339267037, 70604384569005,2414086713172695,89049201691604881, 3525160713653081279,149075374211881719939, 6707440248292609651513,319946143503599791200675] |