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.

A227025 T(n,k)=Number of nXk (0,1,2) arrays of permanents of 2X2 subblocks of some (n+1)X(k+1) binary array with rows and columns of the latter in lexicographically nondecreasing order.

Table of values

n a(n)
1 3
2 7
3 7
4 12
5 26
6 12
7 18
8 72
9 72
10 18
11 25
12 171
13 335
14 171
15 25
16 33
17 368
18 1366
19 1366
20 368
21 33
22 42
23 729
24 4948
25 10050
26 4948
27 729
28 42
29 52
30 1343
31 16115
32 65317
33 65317
34 16115
35 1343
36 52
37 63
38 2325
39 47659
40 375270
41 786154
42 375270
43 47659
44 2325
45 63
46 75
47 3819
48 129463
49 1924848

List of values

[3, 7, 7, 12, 26, 12, 18, 72, 72, 18, 25, 171, 335, 171, 25, 33, 368, 1366, 1366, 368, 33, 42, 729, 4948, 10050, 4948, 729, 42, 52, 1343, 16115, 65317, 65317, 16115, 1343, 52, 63, 2325, 47659, 375270, 786154, 375270, 47659, 2325, 63, 75, 3819, 129463, 1924848]