n | a(n) |
---|---|
4 | 0 |
5 | 0 |
6 | 0 |
7 | 0 |
8 | 0 |
9 | 0 |
10 | 0 |
11 | 0 |
12 | 1 |
13 | 0 |
14 | 1 |
15 | 1 |
16 | 3 |
17 | 4 |
18 | 12 |
19 | 23 |
20 | 73 |
21 | 192 |
22 | 651 |
23 | 2070 |
24 | 7290 |
25 | 25381 |
26 | 91441 |
27 | 329824 |
28 | 1204737 |
29 | 4412031 |
30 | 16248772 |
31 | 59995535 |
32 | 222231424 |
33 | 825028656 |
34 | 3069993552 |
35 | 11446245342 |
36 | 42758608761 |
37 | 160012226334 |
38 | 599822851579 |
39 | 2252137171764 |
40 | 8469193859271 |
41 | 31896058068930 |
[0,0,0,0,0,0,0,0,1,0,1,1,3,4,12,23,73,192,651, 2070,7290,25381,91441,329824,1204737,4412031, 16248772,59995535,222231424,825028656,3069993552, 11446245342,42758608761,160012226334,599822851579, 2252137171764,8469193859271,31896058068930] |