n | a(n) |
---|---|
0 | 0 |
1 | 4 |
2 | 25 |
3 | 160 |
4 | 1193 |
5 | 9585 |
6 | 80020 |
7 | 686048 |
8 | 6003530 |
9 | 53378283 |
10 | 480532488 |
11 | 4369582734 |
12 | 40063566855 |
13 | 369893939287 |
14 | 3435376839800 |
15 | 32069022099022 |
16 | 300694113015105 |
17 | 2830466318006780 |
18 | 26735673312004455 |
19 | 253315661161665338 |
20 | 2406763761677705769 |
21 | 22923886160712831134 |
22 | 218839439542390117580 |
[0,4,25,160,1193,9585,80020,686048,6003530, 53378283,480532488,4369582734,40063566855, 369893939287,3435376839800,32069022099022, 300694113015105,2830466318006780, 26735673312004455,253315661161665338, 2406763761677705769,22923886160712831134, 218839439542390117580] |