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.

A135689 a(n) = a(n-2) - (a(floor(n/2)) - a(abs(floor(n/2) - 1))) if (n mod 2 = 0), otherwise a(n-1) - (a(abs(floor(n/2) - 2)) - a(abs(floor(n/2) - 3))).

Table of values

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

List of values

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