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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.

A131432 Triangle read by rows: (A000012 * A131431) + (A131431 * A000012) - A000012 as infinite lower triangular matrices.

Table of values

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

List of values

[1, 4, 7, 7, 10, 13, 10, 13, 16, 19, 13, 16, 19, 22, 25, 16, 19, 22, 25, 28, 31, 19, 22, 25, 28, 31, 34, 37, 22, 25, 28, 31, 34, 37, 40, 43, 25, 28, 31, 34, 37, 40, 43, 46, 49, 28, 31, 34, 37, 40, 43, 46, 49, 52, 55, 31, 34, 37, 40, 43, 46, 49, 52, 55, 58, 61, 34, 37, 40, 43, 46, 49, 52, 55, 58, 61, 64, 67]

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

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