n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 1 |
6 | 1 |
7 | 2 |
8 | 4 |
9 | 7 |
10 | 13 |
11 | 24 |
12 | 43 |
13 | 78 |
14 | 141 |
15 | 253 |
16 | 455 |
17 | 818 |
18 | 1468 |
19 | 2637 |
20 | 4734 |
21 | 8495 |
22 | 15247 |
23 | 27361 |
24 | 49094 |
25 | 88093 |
26 | 158063 |
27 | 283599 |
28 | 508840 |
29 | 912956 |
30 | 1638003 |
31 | 2938861 |
32 | 5272795 |
33 | 9460227 |
34 | 16973125 |
35 | 30452380 |
36 | 54636174 |
37 | 98025512 |
38 | 175872397 |
39 | 315541228 |
40 | 566127763 |
[0,0,0,0,1,1,2,4,7,13,24,43,78,141,253,455,818, 1468,2637,4734,8495,15247,27361,49094,88093, 158063,283599,508840,912956,1638003,2938861, 5272795,9460227,16973125,30452380,54636174, 98025512,175872397,315541228,566127763] |