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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.

A283417 Number T(n,k) of triangle-free graphs on n unlabeled nodes with exactly k connected components; triangle T(n,k), n>=0, 0<=k<=n, read by rows.

Table of values

n a(n)
0 1
1 0
2 1
3 0
4 1
5 1
6 0
7 1
8 1
9 1
10 0
11 3
12 2
13 1
14 1
15 0
16 6
17 4
18 2
19 1
20 1
21 0
22 19
23 10
24 5
25 2
26 1
27 1
28 0
29 59
30 28
31 11
32 5
33 2
34 1
35 1
36 0
37 267
38 90
39 32
40 12
41 5
42 2
43 1
44 1
45 0
46 1380
47 363
48 100
49 33
50 12
51 5
52 2
53 1
54 1
55 0
56 9832
57 1784
58 397
59 104
60 34
61 12
62 5
63 2
64 1
65 1
66 0
67 90842
68 11770
69 1892
70 407
71 105
72 34
73 12
74 5
75 2
76 1
77 1

List of values

[1, 0, 1, 0, 1, 1, 0, 1, 1, 1, 0, 3, 2, 1, 1, 0, 6, 4, 2, 1, 1, 0, 19, 10, 5, 2, 1, 1, 0, 59, 28, 11, 5, 2, 1, 1, 0, 267, 90, 32, 12, 5, 2, 1, 1, 0, 1380, 363, 100, 33, 12, 5, 2, 1, 1, 0, 9832, 1784, 397, 104, 34, 12, 5, 2, 1, 1, 0, 90842, 11770, 1892, 407, 105, 34, 12, 5, 2, 1, 1]