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.

A195588 a(n) = Sum_{k=0..2*n} (-1)^k * moebius(2*n-k+1) * moebius(k+1).

Table of values

n a(n)
0 1
1 -3
2 -1
3 2
4 3
5 1
6 1
7 6
8 0
9 -3
10 5
11 2
12 1
13 -1
14 5
15 -8
16 5
17 10
18 -7
19 2
20 3
21 -9
22 -1
23 6
24 4
25 -3
26 8
27 2
28 -3
29 3
30 -11
31 2
32 13
33 -15
34 5
35 -2
36 -5
37 5
38 13
39 -8
40 -7
41 9
42 3
43 -2
44 18
45 -1
46 -7
47 -4
48 -14
49 -6
50 7
51 -4
52 -3
53 2
54 1
55 6
56 7
57 7
58 -9
59 18
60 -13
61 7
62 14
63 -12
64 1
65 -7
66 1
67 0
68 -3
69 -13
70 7
71 6
72 -3
73 -5
74 22
75 -16
76 3
77 -1
78 -11
79 2
80 8
81 -5
82 -15
83 6
84 1
85 -9
86 3
87 18
88 1
89 10
90 -13
91 8
92 9
93 3
94 -15
95 -2
96 -7
97 6
98 16
99 -4
100 1
101 1
102 3
103 -2
104 49
105 -7
106 -9
107 -6
108 -1
109 -9
110 -3
111 -20
112 -13
113 -11
114 -11
115 -22
116 12
117 25
118 7
119 0
120 -6
121 5
122 3
123 -2
124 -18
125 4
126 7
127 4
128 -1
129 -7
130 -5
131 -2
132 -15
133 3
134 32
135 2
136 15
137 11
138 -1
139 12
140 5
141 -23
142 3
143 -2
144 -17
145 1
146 10
147 4
148 7
149 16
150 13
151 34
152 -2
153 -31
154 -11
155 -12

List of values

[1, -3, -1, 2, 3, 1, 1, 6, 0, -3, 5, 2, 1, -1, 5, -8, 5, 10, -7, 2, 3, -9, -1, 6, 4, -3, 8, 2, -3, 3, -11, 2, 13, -15, 5, -2, -5, 5, 13, -8, -7, 9, 3, -2, 18, -1, -7, -4, -14, -6, 7, -4, -3, 2, 1, 6, 7, 7, -9, 18, -13, 7, 14, -12, 1, -7, 1, 0, -3, -13, 7, 6, -3, -5, 22, -16, 3, -1, -11, 2, 8, -5, -15, 6, 1, -9, 3, 18, 1, 10, -13, 8, 9, 3, -15, -2, -7, 6, 16, -4, 1, 1, 3, -2, 49, -7, -9, -6, -1, -9, -3, -20, -13, -11, -11, -22, 12, 25, 7, 0, -6, 5, 3, -2, -18, 4, 7, 4, -1, -7, -5, -2, -15, 3, 32, 2, 15, 11, -1, 12, 5, -23, 3, -2, -17, 1, 10, 4, 7, 16, 13, 34, -2, -31, -11, -12]