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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.

A217250 Minimal length of formulas representing n only using addition, multiplication, exponentiation 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 9
9 9
10 11
11 13
12 13
13 15
14 15
15 15
16 11
17 13
18 13
19 15
20 15
21 17
22 17
23 19
24 15
25 13
26 15
27 11
28 13
29 15
30 17
31 19
32 13
33 15
34 17
35 19
36 13
37 15
38 17
39 19
40 19
41 21
42 21
43 23
44 21
45 19
46 21
47 23
48 17
49 15
50 17
51 19
52 19
53 21
54 15
55 17
56 17
57 19
58 19
59 21
60 21
61 23
62 23
63 21
64 13
65 15
66 17
67 19

List of values

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

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