n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 8 |
3 | 53 |
4 | 336 |
5 | 2105 |
6 | 13144 |
7 | 81997 |
8 | 511392 |
9 | 3189169 |
10 | 19888040 |
11 | 124023461 |
12 | 773419248 |
13 | 4823095913 |
14 | 30077155576 |
15 | 187563189565 |
16 | 1169656805184 |
17 | 7294059356257 |
18 | 45486249993032 |
19 | 283655347025429 |
20 | 1768894026280080 |
[0,1,8,53,336,2105,13144,81997,511392,3189169, 19888040,124023461,773419248,4823095913, 30077155576,187563189565,1169656805184, 7294059356257,45486249993032,283655347025429, 1768894026280080] |