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.

A305845 a(1) = a(2) = a(3) = 1; for n > 3, a(n) = a(a(n-2)) + a(n-a(n-2)).

Table of values

n a(n)
1 1
2 1
3 1
4 2
5 3
6 3
7 3
8 4
9 4
10 5
11 5
12 6
13 7
14 7
15 7
16 7
17 8
18 8
19 9
20 10
21 10
22 11
23 12
24 12
25 13
26 13
27 14
28 14
29 14
30 14
31 15
32 15
33 15
34 16
35 17
36 17
37 18
38 18
39 18
40 19
41 20
42 21
43 22
44 22
45 23
46 23
47 24
48 25
49 25
50 26
51 26
52 26
53 27
54 27
55 28
56 28
57 28
58 28
59 29
60 29
61 29
62 29
63 30
64 31
65 31
66 32
67 32
68 32
69 33
70 33
71 33
72 33
73 34
74 35
75 36
76 37
77 37
78 38
79 39
80 39
81 39

List of values

[1, 1, 1, 2, 3, 3, 3, 4, 4, 5, 5, 6, 7, 7, 7, 7, 8, 8, 9, 10, 10, 11, 12, 12, 13, 13, 14, 14, 14, 14, 15, 15, 15, 16, 17, 17, 18, 18, 18, 19, 20, 21, 22, 22, 23, 23, 24, 25, 25, 26, 26, 26, 27, 27, 28, 28, 28, 28, 29, 29, 29, 29, 30, 31, 31, 32, 32, 32, 33, 33, 33, 33, 34, 35, 36, 37, 37, 38, 39, 39, 39]

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

Content is available under The OEIS End-User License Agreement.