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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.

A179301 Number of stable isotopes of element n.

Table of values

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

List of values

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