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.

A060208 a(n) = 2*pi(n) - pi(2*n), where pi(i) = A000720(i).

Table of values

n a(n)
1 -1
2 0
3 1
4 0
5 2
6 1
7 2
8 2
9 1
10 0
11 2
12 1
13 3
14 3
15 2
16 1
17 3
18 3
19 4
20 4
21 3
22 2
23 4
24 3
25 3
26 3
27 2
28 2
29 4
30 3
31 4
32 4
33 4
34 3
35 3
36 2
37 3
38 3
39 3
40 2
41 4
42 3
43 5
44 5
45 4
46 4
47 6
48 6
49 5
50 5
51 4
52 3
53 5
54 4
55 3
56 3
57 2
58 2
59 4
60 4
61 6
62 6
63 6
64 5
65 5
66 4
67 6
68 6
69 5
70 4
71 6
72 6
73 8
74 8
75 7
76 6
77 6
78 6
79 7
80 7
81 7
82 6
83 8
84 7
85 7
86 7
87 6
88 6
89 8
90 7
91 6
92 6
93 6
94 6
95 6
96 5
97 6
98 6
99 5
100 4
101 6
102 6
103 8
104 8
105 8
106 7
107 9
108 9
109 11
110 11
111 11
112 10
113 12
114 11
115 10
116 10
117 9
118 9
119 9
120 8
121 7
122 7

List of values

[-1, 0, 1, 0, 2, 1, 2, 2, 1, 0, 2, 1, 3, 3, 2, 1, 3, 3, 4, 4, 3, 2, 4, 3, 3, 3, 2, 2, 4, 3, 4, 4, 4, 3, 3, 2, 3, 3, 3, 2, 4, 3, 5, 5, 4, 4, 6, 6, 5, 5, 4, 3, 5, 4, 3, 3, 2, 2, 4, 4, 6, 6, 6, 5, 5, 4, 6, 6, 5, 4, 6, 6, 8, 8, 7, 6, 6, 6, 7, 7, 7, 6, 8, 7, 7, 7, 6, 6, 8, 7, 6, 6, 6, 6, 6, 5, 6, 6, 5, 4, 6, 6, 8, 8, 8, 7, 9, 9, 11, 11, 11, 10, 12, 11, 10, 10, 9, 9, 9, 8, 7, 7]