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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.

A151689 a(n) = sum_{k >= 1} 2^wt(k) * binomial(wt(n+k),k).

Table of values

n a(n)
0 2
1 6
2 4
3 6
4 16
5 16
6 6
7 6
8 16
9 16
10 18
11 40
12 50
13 30
14 8
15 6
16 16
17 16
18 18
19 40
20 50
21 30
22 20
23 40
24 50
25 54
26 100
27 142
28 112
29 48
30 10
31 6
32 16
33 16
34 18
35 40
36 50
37 30
38 20
39 40
40 50
41 54
42 100
43 142
44 112
45 48
46 22
47 40
48 50
49 54
50 100
51 142
52 112
53 72
54 102
55 142
56 160
57 256
58 386
59 368
60 210
61 70
62 12
63 6
64 16
65 16
66 18
67 40
68 50

List of values

[2, 6, 4, 6, 16, 16, 6, 6, 16, 16, 18, 40, 50, 30, 8, 6, 16, 16, 18, 40, 50, 30, 20, 40, 50, 54, 100, 142, 112, 48, 10, 6, 16, 16, 18, 40, 50, 30, 20, 40, 50, 54, 100, 142, 112, 48, 22, 40, 50, 54, 100, 142, 112, 72, 102, 142, 160, 256, 386, 368, 210, 70, 12, 6, 16, 16, 18, 40, 50]

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

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