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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.

A151904 a(n) = (3^(wt(k)+f(j))-1)/2 if n = 6k+j, 0 <= j < 6, where wt = A000120, f = A151899.

Table of values

n a(n)
0 0
1 0
2 1
3 1
4 1
5 4
6 1
7 1
8 4
9 4
10 4
11 13
12 1
13 1
14 4
15 4
16 4
17 13
18 4
19 4
20 13
21 13
22 13
23 40
24 1
25 1
26 4
27 4
28 4
29 13
30 4
31 4
32 13
33 13
34 13
35 40
36 4
37 4
38 13
39 13
40 13
41 40
42 13
43 13
44 40
45 40
46 40
47 121
48 1
49 1
50 4
51 4
52 4
53 13
54 4
55 4
56 13
57 13
58 13
59 40
60 4
61 4
62 13
63 13
64 13
65 40
66 13
67 13
68 40
69 40
70 40
71 121
72 4
73 4
74 13
75 13
76 13
77 40
78 13
79 13
80 40
81 40
82 40

List of values

[0, 0, 1, 1, 1, 4, 1, 1, 4, 4, 4, 13, 1, 1, 4, 4, 4, 13, 4, 4, 13, 13, 13, 40, 1, 1, 4, 4, 4, 13, 4, 4, 13, 13, 13, 40, 4, 4, 13, 13, 13, 40, 13, 13, 40, 40, 40, 121, 1, 1, 4, 4, 4, 13, 4, 4, 13, 13, 13, 40, 4, 4, 13, 13, 13, 40, 13, 13, 40, 40, 40, 121, 4, 4, 13, 13, 13, 40, 13, 13, 40, 40, 40]

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