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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.

A212663 Number of ways to represent n’ as x’ + y’, where x+y = n, x > 0, and n’, x’, y’ are the arithmetic derivatives of n, x, y.

Table of values

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

List of values

[0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 2, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 2, 0, 0, 2, 0, 0, 1, 1, 0, 1, 2, 0, 1]

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

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