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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.

A072509 Number of Fibonacci numbers F(k) <= 10^n which end in 1.

Table of values

n a(n)
0 2
1 2
2 3
3 3
4 4
5 5
6 6
7 6
8 6
9 7
10 7
11 7
12 8
13 10
14 11
15 11
16 11
17 13
18 13
19 14
20 14
21 15
22 15
23 15
24 15
25 17
26 18
27 19
28 19
29 20
30 21
31 22
32 22
33 22
34 23
35 23
36 23
37 23
38 26
39 27
40 27
41 27
42 29
43 29
44 30
45 30
46 31
47 31
48 31
49 31
50 32
51 34
52 35
53 35
54 36
55 37
56 38
57 38
58 38
59 39
60 39
61 39
62 39
63 42
64 42
65 43
66 43
67 45
68 45
69 46
70 46
71 47
72 47

List of values

[2, 2, 3, 3, 4, 5, 6, 6, 6, 7, 7, 7, 8, 10, 11, 11, 11, 13, 13, 14, 14, 15, 15, 15, 15, 17, 18, 19, 19, 20, 21, 22, 22, 22, 23, 23, 23, 23, 26, 27, 27, 27, 29, 29, 30, 30, 31, 31, 31, 31, 32, 34, 35, 35, 36, 37, 38, 38, 38, 39, 39, 39, 39, 42, 42, 43, 43, 45, 45, 46, 46, 47, 47]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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