n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 1 |
3 | 1 |
4 | 3 |
5 | 8 |
6 | 25 |
7 | 84 |
8 | 301 |
9 | 1139 |
10 | 4528 |
11 | 18849 |
12 | 81968 |
13 | 371622 |
14 | 1753164 |
15 | 8589608 |
16 | 43624741 |
17 | 229255133 |
18 | 1244544545 |
19 | 6968765313 |
20 | 40195073827 |
21 | 238527741350 |
22 | 1454722738679 |
23 | 9108812009826 |
24 | 58503226812174 |
25 | 385086101416594 |
[1,0,1,1,3,8,25,84,301,1139,4528,18849,81968, 371622,1753164,8589608,43624741,229255133, 1244544545,6968765313,40195073827,238527741350, 1454722738679,9108812009826,58503226812174, 385086101416594] |