cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A191907 Square array read by antidiagonals up: T(n,k) = -(n-1) if n divides k, else 1.

Table of values

n a(n)
1 0
2 1
3 0
4 1
5 -1
6 0
7 1
8 1
9 1
10 0
11 1
12 1
13 -2
14 -1
15 0
16 1
17 1
18 1
19 1
20 1
21 0
22 1
23 1
24 1
25 -3
26 1
27 -1
28 0
29 1
30 1
31 1
32 1
33 1
34 -2
35 1
36 0
37 1
38 1
39 1
40 1
41 -4
42 1
43 1
44 -1
45 0
46 1
47 1
48 1
49 1
50 1
51 1
52 1
53 1
54 1
55 0
56 1
57 1
58 1
59 1
60 1
61 -5
62 1
63 -3
64 -2
65 -1
66 0
67 1
68 1
69 1
70 1
71 1
72 1
73 1
74 1
75 1
76 1
77 1
78 0
79 1
80 1
81 1
82 1
83 1
84 1
85 -6
86 1
87 1
88 1
89 1
90 -1
91 0
92 1
93 1
94 1
95 1
96 1
97 1
98 1
99 1
100 1
101 -4
102 1
103 -2
104 1
105 0
106 1
107 1
108 1
109 1
110 1
111 1
112 1
113 -7
114 1
115 1
116 1
117 -3
118 1
119 -1
120 0
121 1
122 1
123 1
124 1
125 1
126 1
127 1
128 1
129 1
130 1
131 1
132 1
133 1
134 1
135 1
136 0

List of values

[0, 1, 0, 1, -1, 0, 1, 1, 1, 0, 1, 1, -2, -1, 0, 1, 1, 1, 1, 1, 0, 1, 1, 1, -3, 1, -1, 0, 1, 1, 1, 1, 1, -2, 1, 0, 1, 1, 1, 1, -4, 1, 1, -1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, -5, 1, -3, -2, -1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, -6, 1, 1, 1, 1, -1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, -4, 1, -2, 1, 0, 1, 1, 1, 1, 1, 1, 1, -7, 1, 1, 1, -3, 1, -1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0]