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.

A023831 Sum of exponents in prime-power factorization of C(4n,n+1).

Table of values

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

List of values

[2, 4, 4, 7, 7, 8, 8, 11, 11, 12, 8, 12, 13, 15, 13, 18, 14, 18, 14, 18, 20, 18, 17, 21, 22, 20, 19, 22, 20, 24, 19, 26, 24, 26, 23, 28, 27, 27, 27, 30, 29, 31, 27, 30, 30, 30, 27, 34, 31, 33, 31, 34, 33, 33, 30, 34, 33, 36, 31, 37, 38, 39, 37, 42, 39, 41, 38, 42, 43, 43, 38, 46, 44, 44, 44, 46, 46]

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