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.

A318664 Numerators of the sequence whose Dirichlet convolution with itself yields A064664, the inverse permutation of EKG-sequence.

Table of values

n a(n)
1 1
2 1
3 5
4 1
5 5
6 -1
7 7
8 3
9 -1
10 -1
11 10
12 3
13 14
14 -1
15 -7
16 5
17 33
18 59
19 37
20 9
21 -10
22 -1
23 43
24 -1
25 -1
26 -1
27 181
28 13
29 57
30 89
31 61
32 15
33 -29
34 -1
35 -45
36 31
37 67
38 -1
39 -41
40 1
41 37
42 129
43 81
44 11
45 301
46 -1
47 89
48 21
49 1
50 26
51 -97
52 10
53 50
54 -93
55 -47
56 -5
57 -109
58 -1
59 107
60 -33
61 115
62 -1
63 411
64 15
65 -43
66 201
67 64
68 33
69 -127
70 56
71 67
72 181
73 69
74 -1
75 283
76 35
77 -31
78 255
79 151
80 7

List of values

[1, 1, 5, 1, 5, -1, 7, 3, -1, -1, 10, 3, 14, -1, -7, 5, 33, 59, 37, 9, -10, -1, 43, -1, -1, -1, 181, 13, 57, 89, 61, 15, -29, -1, -45, 31, 67, -1, -41, 1, 37, 129, 81, 11, 301, -1, 89, 21, 1, 26, -97, 10, 50, -93, -47, -5, -109, -1, 107, -33, 115, -1, 411, 15, -43, 201, 64, 33, -127, 56, 67, 181, 69, -1, 283, 35, -31, 255, 151, 7]