n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 145 |
3 | 584 |
4 | 21169 |
5 | 85260 |
6 | 3090529 |
7 | 12447376 |
8 | 451196065 |
9 | 1817231636 |
10 | 65871534961 |
11 | 265303371480 |
12 | 9616792908241 |
13 | 38732475004444 |
14 | 1403985893068225 |
15 | 5654676047277344 |
16 | 204972323595052609 |
17 | 825543970427487780 |
18 | 29924555258984612689 |
19 | 120523765006365938536 |
[1,4,145,584,21169,85260,3090529,12447376, 451196065,1817231636,65871534961,265303371480, 9616792908241,38732475004444,1403985893068225, 5654676047277344,204972323595052609, 825543970427487780,29924555258984612689, 120523765006365938536] |