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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.

A347840 A surjective map of the positive numbers congruent to 5 modulo 8 (A004770) to the positive numbers congruent to 1, 3, or 7 modulo 8 (A047529).

Table of values

n a(n)
1 1
2 3
3 1
4 7
5 9
6 11
7 3
8 15
9 17
10 19
11 1
12 23
13 25
14 27
15 7
16 31
17 33
18 35
19 9
20 39
21 41
22 43
23 11
24 47
25 49
26 51
27 3
28 55
29 57
30 59
31 15
32 63
33 65
34 67
35 17
36 71
37 73
38 75
39 19
40 79
41 81
42 83
43 1
44 87
45 89
46 91
47 23
48 95
49 97
50 99
51 25
52 103
53 105
54 107
55 27
56 111
57 113
58 115
59 7
60 119
61 121

List of values

[1, 3, 1, 7, 9, 11, 3, 15, 17, 19, 1, 23, 25, 27, 7, 31, 33, 35, 9, 39, 41, 43, 11, 47, 49, 51, 3, 55, 57, 59, 15, 63, 65, 67, 17, 71, 73, 75, 19, 79, 81, 83, 1, 87, 89, 91, 23, 95, 97, 99, 25, 103, 105, 107, 27, 111, 113, 115, 7, 119, 121]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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