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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.

A023991 Sum of exponents of primes in multinomial coefficient M(3n; n+1,n,n-1).

Table of values

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

List of values

[1, 4, 6, 8, 8, 12, 12, 13, 13, 15, 17, 20, 19, 22, 21, 22, 21, 24, 25, 26, 25, 31, 30, 32, 30, 31, 33, 33, 32, 36, 34, 36, 34, 36, 36, 37, 36, 40, 40, 42, 40, 45, 48, 49, 49, 51, 50, 52, 49, 50, 50, 53, 50, 56, 53, 53, 53, 55, 58, 60, 59, 62, 60, 60, 55, 58, 59, 61, 60, 65, 62, 65, 63, 66, 69, 68]

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