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.

A323455 Irregular triangle read by rows: row n lists the numbers that can be obtained from the binary expansion of n by inserting a single 0 after any 1.

Table of values

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

List of values

[2, 4, 5, 6, 8, 9, 10, 10, 12, 11, 13, 14, 16, 17, 18, 18, 20, 19, 21, 22, 20, 24, 21, 25, 26, 22, 26, 28, 23, 27, 29, 30, 32, 33, 34, 34, 36, 35, 37, 38, 36, 40, 37, 41, 42, 38, 42, 44, 39, 43, 45, 46, 40, 48, 41, 49, 50, 42, 50, 52, 43, 51, 53, 54, 44, 52, 56]

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

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