cp's OEIS Frontend

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.

A134249 Triangle read by rows, taken from the lower triangular matrix (M * A000012 + A000012 * M) - A000012; where M = lower triangular matrix with (1,1,1,...) in the main diagonal and the triangular numbers in the subdiagonal and A000012 = (1; 1,1; 1,1,1; ...).

Table of values

n a(n)
1 1
2 3
3 1
4 5
5 7
6 1
7 8
8 10
9 13
10 1
11 12
12 14
13 17
14 21
15 1
16 17
17 19
18 22
19 26
20 31
21 1
22 23
23 25
24 28
25 32
26 37
27 43
28 1
29 30
30 32
31 35
32 39
33 44
34 50
35 57
36 1
37 38
38 40
39 43
40 47
41 52
42 58
43 65
44 73
45 1
46 47
47 49
48 52
49 56
50 61
51 67
52 74
53 82
54 91
55 1

List of values

[1, 3, 1, 5, 7, 1, 8, 10, 13, 1, 12, 14, 17, 21, 1, 17, 19, 22, 26, 31, 1, 23, 25, 28, 32, 37, 43, 1, 30, 32, 35, 39, 44, 50, 57, 1, 38, 40, 43, 47, 52, 58, 65, 73, 1, 47, 49, 52, 56, 61, 67, 74, 82, 91, 1]

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

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