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.

A131295 a(n)=ds_4(a(n-1))+ds_4(a(n-2)), a(0)=0, a(1)=1; where ds_4=digital sum base 4.

Table of values

n a(n)
0 0
1 1
2 1
3 2
4 3
5 5
6 5
7 4
8 3
9 4
10 4
11 2
12 3
13 5
14 5
15 4
16 3
17 4
18 4
19 2
20 3
21 5
22 5
23 4
24 3
25 4
26 4
27 2
28 3
29 5
30 5
31 4
32 3
33 4
34 4
35 2
36 3
37 5
38 5
39 4
40 3
41 4
42 4
43 2
44 3
45 5
46 5
47 4
48 3
49 4
50 4
51 2
52 3
53 5
54 5
55 4
56 3
57 4
58 4
59 2
60 3
61 5
62 5
63 4
64 3
65 4
66 4
67 2
68 3
69 5
70 5
71 4
72 3
73 4
74 4
75 2
76 3
77 5
78 5
79 4
80 3
81 4
82 4
83 2
84 3
85 5
86 5
87 4
88 3
89 4
90 4
91 2
92 3
93 5
94 5
95 4
96 3
97 4
98 4
99 2
100 3

List of values

[0, 1, 1, 2, 3, 5, 5, 4, 3, 4, 4, 2, 3, 5, 5, 4, 3, 4, 4, 2, 3, 5, 5, 4, 3, 4, 4, 2, 3, 5, 5, 4, 3, 4, 4, 2, 3, 5, 5, 4, 3, 4, 4, 2, 3, 5, 5, 4, 3, 4, 4, 2, 3, 5, 5, 4, 3, 4, 4, 2, 3, 5, 5, 4, 3, 4, 4, 2, 3, 5, 5, 4, 3, 4, 4, 2, 3, 5, 5, 4, 3, 4, 4, 2, 3, 5, 5, 4, 3, 4, 4, 2, 3, 5, 5, 4, 3, 4, 4, 2, 3]