n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 1 |
3 | 8 |
4 | 60 |
5 | 416 |
6 | 2791 |
7 | 18296 |
8 | 118016 |
9 | 752008 |
10 | 4746341 |
11 | 29727472 |
12 | 185016612 |
13 | 1145415208 |
14 | 7059265827 |
15 | 43338407712 |
16 | 265168691392 |
17 | 1617656173824 |
18 | 9842665771649 |
19 | 59748291677832 |
20 | 361933688520940 |
21 | 2188328005246304 |
22 | 13208464812265559 |
23 | 79600379336505560 |
24 | 479025509574159232 |
[0,0,1,8,60,416,2791,18296,118016,752008,4746341, 29727472,185016612,1145415208,7059265827, 43338407712,265168691392,1617656173824, 9842665771649,59748291677832,361933688520940, 2188328005246304,13208464812265559, 79600379336505560,479025509574159232] |