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.

A219866 Number A(n,k) of tilings of a k X n rectangle using dominoes and straight (3 X 1) trominoes; square array A(n,k), n>=0, k>=0, read by antidiagonals.

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 0
5 1
6 1
7 1
8 1
9 1
10 1
11 1
12 2
13 1
14 1
15 1
16 1
17 4
18 4
19 1
20 1
21 1
22 2
23 7
24 14
25 7
26 2
27 1
28 1
29 2
30 15
31 41
32 41
33 15
34 2
35 1
36 1
37 3
38 30
39 143
40 184
41 143
42 30
43 3
44 1
45 1
46 4
47 60
48 472
49 1069
50 1069
51 472
52 60
53 4
54 1
55 1
56 5
57 123
58 1562
59 5624
60 9612
61 5624
62 1562
63 123
64 5
65 1

List of values

[1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 4, 4, 1, 1, 1, 2, 7, 14, 7, 2, 1, 1, 2, 15, 41, 41, 15, 2, 1, 1, 3, 30, 143, 184, 143, 30, 3, 1, 1, 4, 60, 472, 1069, 1069, 472, 60, 4, 1, 1, 5, 123, 1562, 5624, 9612, 5624, 1562, 123, 5, 1]