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.

A203564 T(n,k) = Number of n X k 0..2 arrays with row sums equal and column sums equal.

Table of values

n a(n)
1 3
2 3
3 3
4 3
5 9
6 3
7 3
8 9
9 9
10 3
11 3
12 33
13 87
14 33
15 3
16 3
17 53
18 177
19 177
20 53
21 3
22 3
23 183
24 993
25 5673
26 993
27 183
28 3
29 3
30 395
31 10833
32 32613
33 32613
34 10833
35 395
36 3
37 3
38 1249
39 35619
40 513903
41 2577513
42 513903
43 35619
44 1249
45 3
46 3
47 3141
48 219873
49 7343451
50 39612503
51 39612503
52 7343451

List of values

[3, 3, 3, 3, 9, 3, 3, 9, 9, 3, 3, 33, 87, 33, 3, 3, 53, 177, 177, 53, 3, 3, 183, 993, 5673, 993, 183, 3, 3, 395, 10833, 32613, 32613, 10833, 395, 3, 3, 1249, 35619, 513903, 2577513, 513903, 35619, 1249, 3, 3, 3141, 219873, 7343451, 39612503, 39612503, 7343451]