n | a(n) |
---|---|
1 | 2 |
2 | 20 |
3 | 68 |
4 | 304 |
5 | 1232 |
6 | 5168 |
7 | 21408 |
8 | 89088 |
9 | 370112 |
10 | 1538560 |
11 | 6394368 |
12 | 26577664 |
13 | 110464512 |
14 | 459127808 |
15 | 1908282368 |
16 | 7931445248 |
17 | 32965660672 |
18 | 137016012800 |
19 | 569483091968 |
20 | 2366956929024 |
21 | 9837842644992 |
22 | 40889273090048 |
23 | 169949115056128 |
24 | 706363785412608 |
25 | 2935877583634432 |
26 | 12202461910794240 |
[2,20,68,304,1232,5168,21408,89088,370112,1538560, 6394368,26577664,110464512,459127808,1908282368, 7931445248,32965660672,137016012800,569483091968, 2366956929024,9837842644992,40889273090048, 169949115056128,706363785412608,2935877583634432, 12202461910794240] |