n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 22 |
3 | 130 |
4 | 794 |
5 | 4944 |
6 | 31180 |
7 | 198440 |
8 | 1271626 |
9 | 8192524 |
10 | 53009102 |
11 | 344212906 |
12 | 2241812648 |
13 | 14637774688 |
14 | 95786202688 |
15 | 628002401520 |
16 | 4124304597834 |
17 | 27126202533252 |
18 | 178651732923346 |
19 | 1178005033926998 |
20 | 7776048412324714 |
[1,4,22,130,794,4944,31180,198440,1271626,8192524, 53009102,344212906,2241812648,14637774688, 95786202688,628002401520,4124304597834, 27126202533252,178651732923346,1178005033926998, 7776048412324714] |