n | a(n) |
---|---|
0 | 2 |
1 | 4 |
2 | 10 |
3 | 24 |
4 | 56 |
5 | 130 |
6 | 302 |
7 | 702 |
8 | 1632 |
9 | 3794 |
10 | 8820 |
11 | 20504 |
12 | 47666 |
13 | 110810 |
14 | 257602 |
15 | 598852 |
16 | 1392162 |
17 | 3236384 |
18 | 7523680 |
19 | 17490434 |
20 | 40660326 |
21 | 94523790 |
22 | 219741152 |
23 | 510836202 |
24 | 1187550092 |
25 | 2760719024 |
26 | 6417893090 |
27 | 14919791314 |
28 | 34684306786 |
[2,4,10,24,56,130,302,702,1632,3794,8820,20504, 47666,110810,257602,598852,1392162,3236384, 7523680,17490434,40660326,94523790,219741152, 510836202,1187550092,2760719024,6417893090, 14919791314,34684306786] |