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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.

A091860 a(1)=1, a(n)=sum(i=1,n-1,b(i)) where b(i)=0 if a(i) and a(n-i) are both even, b(i)=1 otherwise.

Table of values

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

List of values

[1, 1, 2, 3, 4, 4, 6, 5, 6, 6, 8, 6, 8, 8, 8, 7, 8, 8, 10, 8, 10, 10, 10, 8, 10, 10, 10, 10, 10, 10, 10, 9, 10, 10, 12, 10, 12, 12, 12, 10, 12, 12, 12, 12, 12, 12, 12, 10, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 12, 12, 14, 12, 14, 14, 14, 12, 14, 14, 14, 14, 14]

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