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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.

A114219 Number triangle T(n,k) = (k-(k-1)*0^(n-k))*[k<=n].

Table of values

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

List of values

[1, 0, 1, 0, 1, 1, 0, 1, 2, 1, 0, 1, 2, 3, 1, 0, 1, 2, 3, 4, 1, 0, 1, 2, 3, 4, 5, 1, 0, 1, 2, 3, 4, 5, 6, 1, 0, 1, 2, 3, 4, 5, 6, 7, 1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 1]