n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 0 |
6 | 1 |
7 | 0 |
8 | 1 |
9 | 1 |
10 | 4 |
11 | 3 |
12 | 15 |
13 | 25 |
14 | 92 |
15 | 234 |
16 | 803 |
17 | 2469 |
18 | 8512 |
19 | 28290 |
20 | 98148 |
21 | 338673 |
22 | 1188338 |
23 | 4180854 |
24 | 14840031 |
25 | 52904562 |
26 | 189724510 |
27 | 683384218 |
28 | 2472961423 |
29 | 8984888982 |
30 | 32772085447 |
31 | 119963084542 |
32 | 440623586740 |
33 | 1623555117611 |
[0,0,0,0,0,1,0,1,1,4,3,15,25,92,234,803,2469,8512, 28290,98148,338673,1188338,4180854,14840031, 52904562,189724510,683384218,2472961423, 8984888982,32772085447,119963084542,440623586740, 1623555117611] |