n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 16 |
3 | 63 |
4 | 246 |
5 | 960 |
6 | 3745 |
7 | 14608 |
8 | 56980 |
9 | 222255 |
10 | 866922 |
11 | 3381492 |
12 | 13189753 |
13 | 51447580 |
14 | 200674984 |
15 | 782747199 |
16 | 3053161710 |
17 | 11909076696 |
18 | 46452209617 |
19 | 181190182360 |
20 | 706745329324 |
21 | 2756710954287 |
22 | 10752749215554 |
23 | 41941871168172 |
24 | 163597283059753 |
25 | 638122961114884 |
[1,4,16,63,246,960,3745,14608,56980,222255,866922, 3381492,13189753,51447580,200674984,782747199, 3053161710,11909076696,46452209617,181190182360, 706745329324,2756710954287,10752749215554, 41941871168172,163597283059753,638122961114884] |