n | a(n) |
---|---|
1 | 1 |
2 | 0 |
3 | 2 |
4 | 7 |
5 | 27 |
6 | 114 |
7 | 523 |
8 | 2589 |
9 | 13744 |
10 | 77821 |
11 | 467767 |
12 | 2972432 |
13 | 19895813 |
14 | 139824045 |
15 | 1028804338 |
16 | 7905124379 |
17 | 63287544055 |
18 | 526827208698 |
19 | 4551453462543 |
20 | 40740750631417 |
21 | 377254241891064 |
22 | 3608700264369193 |
23 | 35613444194346451 |
24 | 362161573323083920 |
25 | 3790824599495473121 |
[1,0,2,7,27,114,523,2589,13744,77821,467767, 2972432,19895813,139824045,1028804338,7905124379, 63287544055,526827208698,4551453462543, 40740750631417,377254241891064,3608700264369193, 35613444194346451,362161573323083920, 3790824599495473121] |