cp's OEIS Frontend

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.

A173419 Length of shortest computation yielding n using addition, subtraction and multiplication (starting from 1).

Table of values

n a(n)
1 0
2 1
3 2
4 2
5 3
6 3
7 4
8 3
9 3
10 4
11 4
12 4
13 5
14 4
15 4
16 3
17 4
18 4
19 5
20 4
21 5
22 5
23 5
24 4
25 4
26 5
27 4
28 5
29 5
30 5
31 5
32 4
33 5
34 5
35 5
36 4
37 5
38 5
39 5
40 5
41 6
42 5
43 6
44 6
45 5
46 6
47 6
48 5
49 5
50 5
51 6
52 6
53 6
54 5
55 6
56 5
57 6
58 6
59 6
60 5
61 6
62 5
63 5
64 4
65 5
66 5
67 6
68 5
69 6
70 6
71 6
72 5
73 6
74 6
75 5
76 6
77 6
78 5
79 5
80 5
81 4
82 5
83 5
84 5
85 6
86 6
87 6
88 6
89 6
90 5
91 6
92 6
93 6
94 6
95 6
96 5
97 6
98 6
99 5
100 5
101 6
102 6
103 6
104 6
105 6
106 6
107 6
108 5

List of values

[0, 1, 2, 2, 3, 3, 4, 3, 3, 4, 4, 4, 5, 4, 4, 3, 4, 4, 5, 4, 5, 5, 5, 4, 4, 5, 4, 5, 5, 5, 5, 4, 5, 5, 5, 4, 5, 5, 5, 5, 6, 5, 6, 6, 5, 6, 6, 5, 5, 5, 6, 6, 6, 5, 6, 5, 6, 6, 6, 5, 6, 5, 5, 4, 5, 5, 6, 5, 6, 6, 6, 5, 6, 6, 5, 6, 6, 5, 5, 5, 4, 5, 5, 5, 6, 6, 6, 6, 6, 5, 6, 6, 6, 6, 6, 5, 6, 6, 5, 5, 6, 6, 6, 6, 6, 6, 6, 5]