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.

A349229 a(n) = Sum_{k=1..n} (-1)^A001222(k)*(-1)^A001222(k+1).

Table of values

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

List of values

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