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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.

A099575 Number triangle T(n,k) = binomial(n + floor(k/2) + 1, n + 1), 0 <= k <= n.

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 1
5 4
6 1
7 1
8 5
9 5
10 1
11 1
12 6
13 6
14 21
15 1
16 1
17 7
18 7
19 28
20 28
21 1
22 1
23 8
24 8
25 36
26 36
27 120
28 1
29 1
30 9
31 9
32 45
33 45
34 165
35 165
36 1
37 1
38 10
39 10
40 55
41 55
42 220
43 220
44 715
45 1
46 1
47 11
48 11
49 66
50 66
51 286
52 286
53 1001
54 1001
55 1
56 1
57 12
58 12
59 78
60 78
61 364
62 364
63 1365
64 1365
65 4368
66 1
67 1
68 13
69 13
70 91
71 91
72 455
73 455
74 1820
75 1820
76 6188
77 6188

List of values

[1, 1, 1, 1, 1, 4, 1, 1, 5, 5, 1, 1, 6, 6, 21, 1, 1, 7, 7, 28, 28, 1, 1, 8, 8, 36, 36, 120, 1, 1, 9, 9, 45, 45, 165, 165, 1, 1, 10, 10, 55, 55, 220, 220, 715, 1, 1, 11, 11, 66, 66, 286, 286, 1001, 1001, 1, 1, 12, 12, 78, 78, 364, 364, 1365, 1365, 4368, 1, 1, 13, 13, 91, 91, 455, 455, 1820, 1820, 6188, 6188]