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.

A207741 T(n,k)=Number of nXk 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 1 0 0 vertically.

Table of values

n a(n)
1 2
2 4
3 4
4 6
5 16
6 6
7 9
8 36
9 36
10 9
11 15
12 81
13 114
14 81
15 14
16 25
17 225
18 361
19 387
20 196
21 22
22 40
23 625
24 1425
25 1849
26 1414
27 484
28 35
29 64
30 1600
31 5625
32 10535
33 10201
34 5302
35 1225
36 56
37 104
38 4096
39 20550
40 60025
41 86355
42 58081
43 20265
44 3136
45 90
46 169
47 10816
48 75076
49 327075
50 731025

List of values

[2, 4, 4, 6, 16, 6, 9, 36, 36, 9, 15, 81, 114, 81, 14, 25, 225, 361, 387, 196, 22, 40, 625, 1425, 1849, 1414, 484, 35, 64, 1600, 5625, 10535, 10201, 5302, 1225, 56, 104, 4096, 20550, 60025, 86355, 58081, 20265, 3136, 90, 169, 10816, 75076, 327075, 731025]