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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.

A023833 Sum of exponents in prime-power factorization of C(4n,n+3).

Table of values

n a(n)
1 0
2 4
3 5
4 7
5 6
6 8
7 8
8 11
9 11
10 12
11 11
12 12
13 10
14 15
15 13
16 17
17 15
18 17
19 16
20 18
21 18
22 20
23 17
24 20
25 19
26 21
27 21
28 21
29 18
30 22
31 20
32 26
33 22
34 26
35 25
36 27
37 25
38 28
39 28
40 30
41 29
42 31
43 30
44 31
45 28
46 28
47 27
48 33
49 30
50 33
51 31
52 33
53 30
54 35
55 30
56 34
57 33
58 35
59 36
60 35
61 33
62 37
63 37
64 42
65 38
66 41
67 39
68 42
69 41
70 44
71 39
72 45
73 42
74 45
75 46
76 45
77 44

List of values

[0, 4, 5, 7, 6, 8, 8, 11, 11, 12, 11, 12, 10, 15, 13, 17, 15, 17, 16, 18, 18, 20, 17, 20, 19, 21, 21, 21, 18, 22, 20, 26, 22, 26, 25, 27, 25, 28, 28, 30, 29, 31, 30, 31, 28, 28, 27, 33, 30, 33, 31, 33, 30, 35, 30, 34, 33, 35, 36, 35, 33, 37, 37, 42, 38, 41, 39, 42, 41, 44, 39, 45, 42, 45, 46, 45, 44]

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