n | a(n) |
---|---|
1 | 0 |
2 | 6 |
3 | 405 |
4 | 7904 |
5 | 76880 |
6 | 486522 |
7 | 2300305 |
8 | 8806336 |
9 | 28725192 |
10 | 82626270 |
11 | 214744629 |
12 | 513368064 |
13 | 1144198952 |
14 | 2402617490 |
15 | 4792612545 |
16 | 9142333696 |
17 | 16768783408 |
18 | 29707141878 |
19 | 51023629173 |
20 | 85234690080 |
21 | 138859666848 |
[0,6,405,7904,76880,486522,2300305,8806336, 28725192,82626270,214744629,513368064,1144198952, 2402617490,4792612545,9142333696,16768783408, 29707141878,51023629173,85234690080,138859666848] |