n | a(n) |
---|---|
1 | 0 |
2 | 6 |
3 | 16 |
4 | 52 |
5 | 174 |
6 | 588 |
7 | 1984 |
8 | 6688 |
9 | 22536 |
10 | 75924 |
11 | 255760 |
12 | 861496 |
13 | 2901696 |
14 | 9773184 |
15 | 32916280 |
16 | 110861104 |
17 | 373373568 |
18 | 1257492096 |
19 | 4235114944 |
20 | 14263430416 |
21 | 48037679232 |
22 | 161785483872 |
23 | 544874848384 |
24 | 1835074738624 |
25 | 6180315022560 |
[0,6,16,52,174,588,1984,6688,22536,75924,255760, 861496,2901696,9773184,32916280,110861104, 373373568,1257492096,4235114944,14263430416, 48037679232,161785483872,544874848384, 1835074738624,6180315022560] |