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.

A162956 a(0) = 0, a(1) = 1; a(2^i + j) = 3a(j) + a(j + 1) for 0 <= j < 2^i.

Table of values

n a(n)
0 0
1 1
2 1
3 4
4 1
5 4
6 7
7 13
8 1
9 4
10 7
11 13
12 7
13 19
14 34
15 40
16 1
17 4
18 7
19 13
20 7
21 19
22 34
23 40
24 7
25 19
26 34
27 46
28 40
29 91
30 142
31 121
32 1
33 4
34 7
35 13
36 7
37 19
38 34
39 40
40 7
41 19
42 34
43 46
44 40
45 91
46 142
47 121
48 7
49 19
50 34
51 46
52 40
53 91
54 142
55 127
56 40
57 91
58 148
59 178
60 211
61 415
62 547
63 364
64 1
65 4
66 7
67 13
68 7
69 19
70 34
71 40
72 7
73 19
74 34
75 46

List of values

[0, 1, 1, 4, 1, 4, 7, 13, 1, 4, 7, 13, 7, 19, 34, 40, 1, 4, 7, 13, 7, 19, 34, 40, 7, 19, 34, 46, 40, 91, 142, 121, 1, 4, 7, 13, 7, 19, 34, 40, 7, 19, 34, 46, 40, 91, 142, 121, 7, 19, 34, 46, 40, 91, 142, 127, 40, 91, 148, 178, 211, 415, 547, 364, 1, 4, 7, 13, 7, 19, 34, 40, 7, 19, 34, 46]

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

Content is available under The OEIS End-User License Agreement.