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.

A130856 The digital root (A010888) of the Catalan numbers A000108.

Table of values

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

List of values

[1, 1, 2, 5, 5, 6, 6, 6, 8, 2, 2, 7, 4, 4, 9, 9, 9, 6, 6, 6, 3, 3, 3, 9, 9, 9, 8, 2, 2, 4, 1, 1, 3, 3, 3, 1, 7, 7, 2, 5, 5, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 3, 3, 3, 9, 9, 9, 3, 3, 3, 6, 6, 6, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 2, 2, 4, 1, 1, 3]