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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.

A205573 Array M read by antidiagonals in which successive rows evidently converge to A001405 (central binomial coefficients).

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 1
5 1
6 1
7 1
8 2
9 1
10 1
11 1
12 2
13 3
14 1
15 1
16 1
17 2
18 3
19 5
20 1
21 1
22 1
23 2
24 3
25 6
26 8
27 1
28 1
29 1
30 2
31 3
32 6
33 10
34 13
35 1
36 1
37 1
38 2
39 3
40 6
41 10
42 19
43 21
44 1
45 1
46 1
47 2
48 3
49 6
50 10
51 20
52 33
53 34
54 1
55 1
56 1
57 2
58 3
59 6
60 10
61 20
62 35
63 61
64 55
65 1
66 1
67 1
68 2
69 3
70 6
71 10
72 20
73 35
74 69
75 108
76 89
77 1

List of values

[1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 2, 3, 1, 1, 1, 2, 3, 5, 1, 1, 1, 2, 3, 6, 8, 1, 1, 1, 2, 3, 6, 10, 13, 1, 1, 1, 2, 3, 6, 10, 19, 21, 1, 1, 1, 2, 3, 6, 10, 20, 33, 34, 1, 1, 1, 2, 3, 6, 10, 20, 35, 61, 55, 1, 1, 1, 2, 3, 6, 10, 20, 35, 69, 108, 89, 1]

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