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.

A156271 a(n)=sum(k=1,n,A000002(A078649(k))).

Table of values

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

List of values

[2, 3, 5, 7, 8, 9, 11, 12, 14, 15, 16, 18, 20, 21, 23, 24, 25, 27, 29, 30, 32, 34, 35, 36, 38, 39, 41, 43, 44, 46, 48, 49, 50, 52, 53, 55, 57, 58, 59, 61, 62, 63, 65, 66, 67, 69, 71, 72, 74, 75, 77, 79, 80, 81, 83, 85, 86, 88, 89, 90, 92, 93, 95, 96, 97, 99, 100, 102, 104, 105]