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.

A159906 Triangle read by rows, A126988 * A054533.

Table of values

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

List of values

[1, 1, 1, 2, -1, 2, 2, 0, 0, 2, 4, -1, -1, -1, 4, 2, 0, 2, -1, 1, 2, 6, -1, -1, -1, -1, -1, 6, 4, 0, 0, 0, 0, 0, 0, 4, 6, -3, 3, 0, 0, -3, 0, 0, 6, 4, 2, -1, -3, 4, -1, 1, -1, 1, 4, 10, -1, -1, -1, -1, -1, -1, -1, -1, -1, 10, 4, -4, 4, 2, 2, 0, 0, -2, 0, 2, 0, 4]

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