n | a(n) |
---|---|
0 | 0 |
1 | 2 |
2 | 12 |
3 | 54 |
4 | 206 |
5 | 712 |
6 | 2294 |
7 | 7024 |
8 | 20656 |
9 | 58842 |
10 | 163250 |
11 | 443062 |
12 | 1180156 |
13 | 3092964 |
14 | 7993116 |
15 | 20401250 |
16 | 51502616 |
17 | 128748512 |
18 | 319010540 |
19 | 784179992 |
20 | 1913668608 |
21 | 4639155964 |
22 | 11178566462 |
23 | 26784974870 |
24 | 63851541584 |
[0,2,12,54,206,712,2294,7024,20656,58842,163250, 443062,1180156,3092964,7993116,20401250,51502616, 128748512,319010540,784179992,1913668608, 4639155964,11178566462,26784974870,63851541584] |