n | a(n) |
---|---|
1 | 2 |
2 | 12 |
3 | 46 |
4 | 144 |
5 | 402 |
6 | 1040 |
7 | 2548 |
8 | 5992 |
9 | 13632 |
10 | 30220 |
11 | 65486 |
12 | 139404 |
13 | 291770 |
14 | 602908 |
15 | 1229242 |
16 | 2482792 |
17 | 4959014 |
18 | 9836840 |
19 | 19323246 |
20 | 37773464 |
21 | 73182570 |
22 | 141345292 |
23 | 270647584 |
24 | 517513972 |
25 | 980893354 |
[2,12,46,144,402,1040,2548,5992,13632,30220,65486, 139404,291770,602908,1229242,2482792,4959014, 9836840,19323246,37773464,73182570,141345292, 270647584,517513972,980893354] |