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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.

A023826 Sum of exponents in prime-power factorization of C(4n,n).

Table of values

n a(n)
0 0
1 2
2 3
3 4
4 5
5 7
6 6
7 9
8 9
9 10
10 10
11 9
12 9
13 13
14 14
15 14
16 14
17 15
18 15
19 15
20 16
21 19
22 16
23 19
24 18
25 21
26 20
27 18
28 19
29 21
30 21
31 22
32 22
33 23
34 25
35 24
36 24
37 27
38 26
39 28
40 26
41 30
42 28
43 28
44 29
45 28
46 28
47 30
48 30
49 31
50 31
51 31
52 31
53 35
54 30
55 31
56 31
57 32
58 34
59 33
60 33
61 38
62 39
63 39
64 37
65 39
66 38
67 39
68 40
69 43
70 40
71 41
72 41
73 44
74 44
75 43
76 44
77 46
78 45

List of values

[0, 2, 3, 4, 5, 7, 6, 9, 9, 10, 10, 9, 9, 13, 14, 14, 14, 15, 15, 15, 16, 19, 16, 19, 18, 21, 20, 18, 19, 21, 21, 22, 22, 23, 25, 24, 24, 27, 26, 28, 26, 30, 28, 28, 29, 28, 28, 30, 30, 31, 31, 31, 31, 35, 30, 31, 31, 32, 34, 33, 33, 38, 39, 39, 37, 39, 38, 39, 40, 43, 40, 41, 41, 44, 44, 43, 44, 46, 45]

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