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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.

A254375 Digital roots of centered heptagonal numbers (A069099).

Table of values

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

List of values

[1, 8, 4, 7, 8, 7, 4, 8, 1, 1, 8, 4, 7, 8, 7, 4, 8, 1, 1, 8, 4, 7, 8, 7, 4, 8, 1, 1, 8, 4, 7, 8, 7, 4, 8, 1, 1, 8, 4, 7, 8, 7, 4, 8, 1, 1, 8, 4, 7, 8, 7, 4, 8, 1, 1, 8, 4, 7, 8, 7, 4, 8, 1, 1, 8, 4, 7, 8, 7, 4, 8, 1, 1, 8, 4, 7, 8, 7, 4, 8, 1, 1, 8, 4, 7, 8]

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