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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.

A059682 Triangle T(n,k) giving number of 2 X k polyominoes with n cells (n >= 2, 1<=k<=n-1).

Table of values

n a(n)
2 1
3 0
4 1
5 0
6 1
7 3
8 0
9 0
10 2
11 3
12 0
13 0
14 1
15 6
16 5
17 0
18 0
19 0
20 2
21 11
22 5
23 0
24 0
25 0
26 1
27 10
28 19
29 7
30 0
31 0
32 0
33 0
34 3
35 22
36 28
37 7
38 0
39 0
40 0
41 0
42 1
43 15
44 52
45 40
46 9
47 0
48 0
49 0
50 0
51 0
52 3
53 45
54 90
55 53
56 9
57 0
58 0
59 0
60 0
61 0
62 1
63 21
64 119
65 158
66 69
67 11
68 0
69 0
70 0
71 0
72 0
73 0
74 4
75 73
76 257
77 238
78 86
79 11
80 0
81 0
82 0
83 0
84 0
85 0
86 1
87 28
88 237
89 505
90 360
91 106
92 13

List of values

[1, 0, 1, 0, 1, 3, 0, 0, 2, 3, 0, 0, 1, 6, 5, 0, 0, 0, 2, 11, 5, 0, 0, 0, 1, 10, 19, 7, 0, 0, 0, 0, 3, 22, 28, 7, 0, 0, 0, 0, 1, 15, 52, 40, 9, 0, 0, 0, 0, 0, 3, 45, 90, 53, 9, 0, 0, 0, 0, 0, 1, 21, 119, 158, 69, 11, 0, 0, 0, 0, 0, 0, 4, 73, 257, 238, 86, 11, 0, 0, 0, 0, 0, 0, 1, 28, 237, 505, 360, 106, 13]