n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | -1 |
3 | -1 |
4 | -1 |
5 | 0 |
6 | 2 |
7 | 6 |
8 | 13 |
9 | 25 |
10 | 45 |
11 | 78 |
12 | 132 |
13 | 220 |
14 | 363 |
15 | 595 |
16 | 971 |
17 | 1580 |
18 | 2566 |
19 | 4162 |
20 | 6745 |
21 | 10925 |
22 | 17689 |
23 | 28634 |
24 | 46344 |
25 | 75000 |
26 | 121367 |
27 | 196391 |
28 | 317783 |
29 | 514200 |
30 | 832010 |
31 | 1346238 |
32 | 2178277 |
33 | 3524545 |
34 | 5702853 |
35 | 9227430 |
36 | 14930316 |
37 | 24157780 |
38 | 39088131 |
39 | 63245947 |
40 | 102334115 |
41 | 165580100 |
42 | 267914254 |
[0,0,-1,-1,-1,0,2,6,13,25,45,78,132,220,363,595, 971,1580,2566,4162,6745,10925,17689,28634,46344, 75000,121367,196391,317783,514200,832010,1346238, 2178277,3524545,5702853,9227430,14930316,24157780, 39088131,63245947,102334115,165580100,267914254] |