n | a(n) |
---|---|
0 | 0 |
1 | 4 |
2 | 28 |
3 | 168 |
4 | 984 |
5 | 5740 |
6 | 33460 |
7 | 195024 |
8 | 1136688 |
9 | 6625108 |
10 | 38613964 |
11 | 225058680 |
12 | 1311738120 |
13 | 7645370044 |
14 | 44560482148 |
15 | 259717522848 |
16 | 1513744654944 |
17 | 8822750406820 |
18 | 51422757785980 |
19 | 299713796309064 |
[0,4,28,168,984,5740,33460,195024,1136688,6625108, 38613964,225058680,1311738120,7645370044, 44560482148,259717522848,1513744654944, 8822750406820,51422757785980,299713796309064] |