n | a(n) |
---|---|
1 | -1 |
2 | -1 |
3 | 2 |
4 | -1 |
5 | 3 |
6 | -1 |
7 | 5 |
8 | 6 |
9 | 4 |
10 | 8 |
11 | 7 |
12 | -1 |
13 | 11 |
14 | 10 |
15 | 14 |
16 | -1 |
17 | 13 |
18 | 12 |
19 | 17 |
20 | 18 |
21 | 15 |
22 | 21 |
23 | 19 |
24 | -1 |
25 | 9 |
26 | 22 |
27 | 26 |
28 | 20 |
29 | 23 |
30 | 24 |
31 | 29 |
32 | 28 |
33 | 27 |
34 | 33 |
35 | 34 |
36 | -1 |
37 | 31 |
38 | 35 |
39 | 38 |
40 | 30 |
41 | 37 |
42 | 40 |
43 | 41 |
44 | 32 |
45 | 44 |
46 | 39 |
47 | 43 |
48 | -1 |
49 | 25 |
50 | 45 |
51 | 46 |
52 | 50 |
53 | 47 |
54 | 42 |
55 | 51 |
56 | 54 |
57 | 55 |
58 | 57 |
59 | 53 |
60 | -1 |
61 | 59 |
62 | 58 |
63 | 52 |
64 | -1 |
65 | 62 |
66 | 56 |
67 | 61 |
68 | 63 |
69 | 65 |
70 | 66 |
71 | 67 |
[-1,-1,2,-1,3,-1,5,6,4,8,7,-1,11,10,14,-1,13,12, 17,18,15,21,19,-1,9,22,26,20,23,24,29,28,27,33,34, -1,31,35,38,30,37,40,41,32,44,39,43,-1,25,45,46, 50,47,42,51,54,55,57,53,-1,59,58,52,-1,62,56,61, 63,65,66,67] |