n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 56 |
3 | 1068 |
4 | 23504 |
5 | 561972 |
6 | 14183880 |
7 | 371911132 |
8 | 10031990560 |
9 | 276589937892 |
10 | 7759696110808 |
11 | 220805824681740 |
12 | 6357540660485616 |
13 | 184876232243020564 |
14 | 5422016433851400552 |
15 | 160187931368799105468 |
16 | 4763038761416835095616 |
17 | 142426926824923660491716 |
[1,4,56,1068,23504,561972,14183880,371911132, 10031990560,276589937892,7759696110808, 220805824681740,6357540660485616, 184876232243020564,5422016433851400552, 160187931368799105468,4763038761416835095616, 142426926824923660491716] |