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.

A355819 Dirichlet inverse of A270419, denominator of the rational number obtained when the exponents in prime factorization of n are reinterpreted as alternating binary sums (A065620).

Table of values

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

List of values

[1, -1, -1, 0, -1, 1, -1, -1, 0, 1, -1, 0, -1, 1, 1, 2, -1, 0, -1, 0, 1, 1, -1, 1, 0, 1, -2, 0, -1, -1, -1, -8, 1, 1, 1, 0, -1, 1, 1, 1, -1, -1, -1, 0, 0, 1, -1, -2, 0, 0, 1, 0, -1, 2, 1, 1, 1, 1, -1, 0, -1, 1, 0, 12, 1, -1, -1, 0, 1, -1, -1, 0, -1, 1, 0, 0, 1, -1, -1, -2, 4, 1, -1, 0, 1, 1, 1, 1, -1, 0, 1, 0, 1, 1, 1, 8]