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.

A175794 a(n) = Sum_{k=1..n} (-1)^A001620(k).

Table of values

n a(n)
1 -1
2 -2
3 -3
4 -2
5 -3
6 -4
7 -3
8 -2
9 -1
10 -2
11 -1
12 -2
13 -3
14 -4
15 -3
16 -2
17 -1
18 0
19 1
20 2
21 3
22 2
23 1
24 2
25 3
26 2
27 3
28 4
29 5
30 6
31 7
32 8
33 9
34 10
35 9
36 8
37 9
38 10
39 11
40 10
41 9
42 8
43 7
44 6
45 5
46 4
47 3
48 2
49 1
50 2
51 1
52 0
53 -1
54 0
55 1
56 2
57 1
58 0
59 1
60 0
61 1
62 0
63 1
64 2
65 3
66 4
67 5
68 6
69 5
70 4
71 5
72 6
73 5
74 4
75 3
76 4
77 5
78 6
79 7
80 6
81 7
82 6
83 5
84 6
85 5
86 6
87 5
88 6
89 7
90 6
91 7
92 6
93 5
94 4
95 5

List of values

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