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.

A247702 Number T(n,k) of tilings of a 5 X n rectangle with pentominoes of any shape and exactly k pentominoes of shape F; triangle T(n,k), n>=0, 0<=k<=max(delta_{3,n},floor((n-2)/2)*2), read by rows.

Table of values

n a(n)
0 1
1 1
2 5
3 52
4 4
5 437
6 60
7 4
8 3342
9 584
10 80
11 21734
12 5372
13 818
14 24
15 2
16 155685
17 49540
18 8800
19 620
20 44
21 1153475
22 439780
23 92500
24 10140
25 856
26 28
27 2
28 8422634
29 3726836
30 914142
31 127596
32 13338
33 760
34 48
35 60853524
36 30683256
37 8544440
38 1425320
39 176156
40 14404
41 1078
42 32
43 2

List of values

[1, 1, 5, 52, 4, 437, 60, 4, 3342, 584, 80, 21734, 5372, 818, 24, 2, 155685, 49540, 8800, 620, 44, 1153475, 439780, 92500, 10140, 856, 28, 2, 8422634, 3726836, 914142, 127596, 13338, 760, 48, 60853524, 30683256, 8544440, 1425320, 176156, 14404, 1078, 32, 2]