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.

A247713 Number T(n,k) of tilings of a 5 X n rectangle with pentominoes of any shape and exactly k pentominoes of shape Z; triangle T(n,k), n>=0, read by rows.

Table of values

n a(n)
0 1
1 1
2 5
3 52
4 4
5 451
6 48
7 2
8 3498
9 484
10 24
11 23502
12 4136
13 300
14 12
15 173611
16 37674
17 3262
18 142
19 1323447
20 335388
21 35938
22 1964
23 44
24 9920654
25 2892492
26 365458
27 25752
28 986
29 12
30 73573634
31 24266128
32 3544842
33 298200
34 15002
35 400
36 6
37 545170514
38 200531918
39 33123244
40 3236018
41 198380
42 7546
43 164
44 2

List of values

[1, 1, 5, 52, 4, 451, 48, 2, 3498, 484, 24, 23502, 4136, 300, 12, 173611, 37674, 3262, 142, 1323447, 335388, 35938, 1964, 44, 9920654, 2892492, 365458, 25752, 986, 12, 73573634, 24266128, 3544842, 298200, 15002, 400, 6, 545170514, 200531918, 33123244, 3236018, 198380, 7546, 164, 2]