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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.

A194513 Second coordinate of (2,7)-Lagrange pair for n.

Table of values

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

List of values

[-1, 0, -1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 4, 3, 4, 3, 4, 3, 4, 3, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 6, 5, 6, 5, 6, 5, 6, 5, 6, 7, 6, 7, 6, 7, 6, 7, 6, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 9, 8, 9, 8, 9, 8, 9, 8, 9, 10, 9, 10, 9, 10, 9, 10, 9, 10, 11, 10, 11]