cp's OEIS Frontend

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.

A128100 Triangle read by rows: T(n,k) is the number of ways to tile a 2 X n rectangle with k pieces of 2 X 2 tiles and n-2k pieces of 1 X 2 tiles (0 <= k <= floor(n/2)).

Table of values

n a(n)
0 1
1 1
2 2
3 1
4 3
5 2
6 5
7 5
8 1
9 8
10 10
11 3
12 13
13 20
14 9
15 1
16 21
17 38
18 22
19 4
20 34
21 71
22 51
23 14
24 1
25 55
26 130
27 111
28 40
29 5
30 89
31 235
32 233
33 105
34 20
35 1
36 144
37 420
38 474
39 256
40 65
41 6
42 233
43 744
44 942
45 594
46 190
47 27
48 1
49 377
50 1308
51 1836
52 1324
53 511
54 98
55 7
56 610
57 2285
58 3522
59 2860
60 1295
61 315
62 35
63 1
64 987
65 3970

List of values

[1, 1, 2, 1, 3, 2, 5, 5, 1, 8, 10, 3, 13, 20, 9, 1, 21, 38, 22, 4, 34, 71, 51, 14, 1, 55, 130, 111, 40, 5, 89, 235, 233, 105, 20, 1, 144, 420, 474, 256, 65, 6, 233, 744, 942, 594, 190, 27, 1, 377, 1308, 1836, 1324, 511, 98, 7, 610, 2285, 3522, 2860, 1295, 315, 35, 1, 987, 3970]