n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 0 |
3 | 1 |
4 | 1 |
5 | 8 |
6 | 26 |
7 | 194 |
8 | 1142 |
9 | 9736 |
10 | 81384 |
11 | 823392 |
12 | 8738016 |
13 | 104336880 |
14 | 1328270880 |
15 | 18419317968 |
16 | 272291315376 |
17 | 4312675967232 |
18 | 72478365279360 |
19 | 1292173575000192 |
20 | 24314102888206464 |
21 | 482046102448383744 |
22 | 10037081891973037824 |
[0,1,0,1,1,8,26,194,1142,9736,81384,823392, 8738016,104336880,1328270880,18419317968, 272291315376,4312675967232,72478365279360, 1292173575000192,24314102888206464, 482046102448383744,10037081891973037824] |