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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.

A181742 Let A181741(n)=2^(t(n))-2^(k(n))-1, where k(n)>=1, t(n)>=k(n)+1. Then a(n)=t(n).

Table of values

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

List of values

[3, 3, 4, 4, 4, 5, 5, 6, 6, 6, 6, 8, 8, 8, 8, 8, 9, 9, 9, 9, 10, 10, 10, 11, 12, 12, 12, 12, 12, 13, 14, 14, 14, 14, 14, 16, 16, 16, 17, 17, 18, 18, 18, 18, 18, 18, 18, 18, 18, 19, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 21, 21, 21, 21, 22, 22, 22, 22, 22, 24, 24, 24, 24, 24, 24, 24]

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