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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.

A280448 Sum of the GCDs of the smaller and larger parts of the partitions of 2n into two squarefree parts.

Table of values

n a(n)
1 1
2 3
3 4
4 4
5 6
6 10
7 9
8 7
9 6
10 20
11 15
12 11
13 17
14 28
15 19
16 11
17 23
18 23
19 25
20 27
21 36
22 48
23 30
24 24
25 12
26 55
27 16
28 35
29 39
30 56
31 41
32 20
33 55
34 73
35 55
36 44
37 50
38 81
39 65
40 39
41 53
42 96
43 56
44 71
45 33
46 97
47 63
48 40
49 29
50 53
51 88
52 83
53 71
54 63
55 91
56 68
57 98
58 126
59 78
60 87
61 80
62 134
63 65
64 40
65 107
66 147
67 89
68 107
69 119

List of values

[1, 3, 4, 4, 6, 10, 9, 7, 6, 20, 15, 11, 17, 28, 19, 11, 23, 23, 25, 27, 36, 48, 30, 24, 12, 55, 16, 35, 39, 56, 41, 20, 55, 73, 55, 44, 50, 81, 65, 39, 53, 96, 56, 71, 33, 97, 63, 40, 29, 53, 88, 83, 71, 63, 91, 68, 98, 126, 78, 87, 80, 134, 65, 40, 107, 147, 89, 107, 119]

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

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