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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.

A213923 Minimal lengths of formulas representing n only using addition, multiplication and the constant 1.

Table of values

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

List of values

[1, 3, 5, 7, 9, 9, 11, 11, 11, 13, 15, 13, 15, 15, 15, 15, 17, 15, 17, 17, 17, 19, 21, 17, 19, 19, 17, 19, 21, 19, 21, 19, 21, 21, 21, 19, 21, 21, 21, 21, 23, 21, 23, 23, 21, 23, 25, 21, 23, 23, 23, 23, 25, 21, 23, 23, 23, 25, 27, 23, 25, 25, 23, 23, 25, 25, 27, 25, 27, 25, 27, 23, 25, 25, 25, 25, 27, 25]

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