n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 10 |
3 | 40 |
4 | 136 |
5 | 544 |
6 | 2080 |
7 | 8320 |
8 | 32896 |
9 | 131584 |
10 | 524800 |
11 | 2099200 |
12 | 8390656 |
13 | 33562624 |
14 | 134225920 |
15 | 536903680 |
16 | 2147516416 |
17 | 8590065664 |
18 | 34359869440 |
19 | 137439477760 |
20 | 549756338176 |
21 | 2199025352704 |
22 | 8796095119360 |
23 | 35184380477440 |
24 | 140737496743936 |
25 | 562949986975744 |
[1,4,10,40,136,544,2080,8320,32896,131584,524800, 2099200,8390656,33562624,134225920,536903680, 2147516416,8590065664,34359869440,137439477760, 549756338176,2199025352704,8796095119360, 35184380477440,140737496743936,562949986975744] |