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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.

A376138 a(n) is the smallest k such that n = ab + cd with 1 <= a,b,c,d <= k.

Table of values

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

List of values

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

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