n | a(n) |
---|---|
-3 | 0 |
-2 | 0 |
-1 | 0 |
0 | 1 |
1 | 1 |
2 | 3 |
3 | 7 |
4 | 16 |
5 | 37 |
6 | 86 |
7 | 199 |
8 | 461 |
9 | 1068 |
10 | 2474 |
11 | 5731 |
12 | 13276 |
13 | 30754 |
14 | 71242 |
15 | 165033 |
16 | 382301 |
17 | 885605 |
18 | 2051515 |
19 | 4752360 |
20 | 11008901 |
21 | 25502256 |
22 | 59076293 |
23 | 136850967 |
24 | 317016966 |
25 | 734373742 |
26 | 1701185901 |
27 | 3940818284 |
28 | 9128954536 |
29 | 21147336648 |
[0,0,0,1,1,3,7,16,37,86,199,461,1068,2474,5731, 13276,30754,71242,165033,382301,885605,2051515, 4752360,11008901,25502256,59076293,136850967, 317016966,734373742,1701185901,3940818284, 9128954536,21147336648] |