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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.

A023830 Sum of exponents in prime-power factorization of C(4n,n-4).

Table of values

n a(n)
4 0
5 3
6 4
7 6
8 6
9 10
10 8
11 8
12 8
13 11
14 12
15 12
16 13
17 14
18 15
19 16
20 12
21 16
22 15
23 17
24 18
25 21
26 17
27 20
28 19
29 19
30 22
31 19
32 21
33 25
34 25
35 26
36 23
37 25
38 25
39 26
40 26
41 28
42 25
43 27
44 25
45 29
46 28
47 27
48 31
49 32
50 31
51 33
52 30
53 30
54 31
55 31
56 31
57 34
58 32
59 33
60 32
61 35
62 35
63 37
64 39
65 42
66 42
67 41
68 37
69 40
70 41
71 38
72 42
73 44
74 40
75 46
76 42
77 45
78 46
79 45
80 44

List of values

[0, 3, 4, 6, 6, 10, 8, 8, 8, 11, 12, 12, 13, 14, 15, 16, 12, 16, 15, 17, 18, 21, 17, 20, 19, 19, 22, 19, 21, 25, 25, 26, 23, 25, 25, 26, 26, 28, 25, 27, 25, 29, 28, 27, 31, 32, 31, 33, 30, 30, 31, 31, 31, 34, 32, 33, 32, 35, 35, 37, 39, 42, 42, 41, 37, 40, 41, 38, 42, 44, 40, 46, 42, 45, 46, 45, 44]

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