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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.

A123739 Partial sums of (-1)^floor(n*e).

Table of values

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

List of values

[1, 0, 1, 2, 1, 2, 1, 0, 1, 0, -1, 0, -1, 0, 1, 0, 1, 2, 1, 2, 1, 0, 1, 0, -1, 0, -1, 0, 1, 0, 1, 2, 1, 2, 1, 0, 1, 0, 1, 2, 1, 2, 3, 2, 3, 2, 1, 2, 1, 0, 1, 0, 1, 2, 1, 2, 3, 2, 3, 2, 1, 2, 1, 0, 1, 0, 1, 2, 1, 2, 3, 2, 3, 2, 1, 2, 1, 2, 3, 2, 3, 4, 3, 4, 3, 2, 3, 2, 1, 2, 1, 2, 3, 2, 3, 4, 3, 4, 3, 2, 3, 2, 1, 2, 1, 2, 3, 2, 3, 2, 1, 2, 1, 0, 1, 0, 1, 2, 1, 2, 3, 2, 3, 2, 1, 2, 1]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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