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A104156 as a simple table

n a(n)
1 0
2 0
3 -1
4 1
5 2
6 2
7 1
8 -1
9 2
10 4
11 5
12 5
13 4
14 2
15 -1
16 3
17 6
18 8
19 9
20 9
21 8
22 6
23 3
24 -1
25 4
26 8
27 11
28 13
29 14
30 14
31 13
32 11
33 8
34 4
35 -1
36 5
37 10
38 14
39 17
40 19
41 20
42 20
43 19
44 17
45 14
46 10
47 5
48 -1
49 6
50 12
51 17
52 21
53 24
54 26
55 27
56 27
57 26
58 24
59 21
60 17
61 12
62 6
63 -1
64 7
65 14
66 20
67 25
68 29
69 32
70 34
71 35
72 35
73 34
74 32
75 29
76 25
77 20
78 14
79 7
80 -1
81 8
82 16
83 23
84 29
85 34
86 38
87 41
88 43
89 44
90 44
91 43
92 41
93 38
94 34
95 29
96 23

[0,0,-1,1,2,2,1,-1,2,4,5,5,4,2,-1,3,6,8,9,9,8,6,3,
 -1,4,8,11,13,14,14,13,11,8,4,-1,5,10,14,17,19,20,
 20,19,17,14,10,5,-1,6,12,17,21,24,26,27,27,26,24,
 21,17,12,6,-1,7,14,20,25,29,32,34,35,35,34,32,29,
 25,20,14,7,-1,8,16,23,29,34,38,41,43,44,44,43,41,
 38,34,29,23]

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Last modified September 24 14:00 EDT 2020. Contains 337321 sequences. (Running on oeis4.)