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.

A309048 Expansion of Product_{k>=0} (1 + x^(3^k) + x^(2*3^k) - x^(3^(k+1))).

Table of values

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

List of values

[1, 1, 1, 0, 1, 1, 0, 1, 1, -1, 0, 0, 1, 1, 1, 0, 1, 1, -1, 0, 0, 1, 1, 1, 0, 1, 1, -2, -1, -1, 1, 0, 0, 0, 0, 0, 1, 1, 1, 0, 1, 1, 0, 1, 1, -1, 0, 0, 1, 1, 1, 0, 1, 1, -2, -1, -1, 1, 0, 0, 0, 0, 0, 1, 1, 1, 0, 1, 1, 0, 1, 1, -1, 0, 0, 1, 1, 1, 0, 1, 1, -3, -2, -2, 1, -1, -1, 0, -1, -1, 2, 1, 1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1]