n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 0 |
3 | 1 |
4 | 1 |
5 | 3 |
6 | 7 |
7 | 16 |
8 | 40 |
9 | 98 |
10 | 246 |
11 | 624 |
12 | 1596 |
13 | 4120 |
14 | 10708 |
15 | 28009 |
16 | 73673 |
17 | 194743 |
18 | 517067 |
19 | 1378365 |
20 | 3687665 |
21 | 9898417 |
22 | 26649117 |
23 | 71943947 |
24 | 194717215 |
25 | 528236599 |
26 | 1436122339 |
27 | 3912244667 |
28 | 10677558423 |
29 | 29192753795 |
30 | 79944089343 |
31 | 219261036592 |
32 | 602226736360 |
[1,0,0,1,1,3,7,16,40,98,246,624,1596,4120,10708, 28009,73673,194743,517067,1378365,3687665,9898417, 26649117,71943947,194717215,528236599,1436122339, 3912244667,10677558423,29192753795,79944089343, 219261036592,602226736360] |