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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.

A247892 Number of nonprimes in n-th row of triangle A077581.

Table of values

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

List of values

[1, 1, 2, 1, 3, 1, 4, 3, 4, 3, 7, 3, 8, 5, 8, 6, 11, 4, 12, 7, 11, 9, 15, 6, 15, 12, 16, 12, 20, 4, 21, 15, 19, 16, 22, 10, 26, 18, 23, 17, 29, 11, 30, 22, 24, 24, 33, 16, 34, 22, 31, 25, 38, 19, 36, 27, 35, 30, 43, 15, 44, 33, 36, 34, 44, 22, 49, 36, 43, 27]

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

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