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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.

A251628 Number of lattice points of the Archimedean tiling (3,4,6,4) on the circles R(n) = sqrt(A249870(n) + A249871(n)* sqrt(3)) around any lattice point. First differences of A251627.

Table of values

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

List of values

[1, 4, 2, 2, 4, 1, 4, 7, 4, 4, 2, 4, 4, 2, 4, 2, 4, 2, 2, 4, 6, 4, 4, 2, 4, 6, 4, 4, 2, 2, 2, 4, 2, 4, 4, 4, 2, 4, 2, 4, 1, 2, 4, 4, 2, 12, 2, 4, 1, 4, 4, 4, 4, 2, 4, 2, 4, 6, 4, 4, 2, 2, 2, 4, 2, 2, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 6, 4, 2, 4, 4]

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