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.

A268073 T(n,k)=Number of nXk 0..3 arrays with every repeated value in every row and column unequal to the previous repeated value, and new values introduced in row-major sequential order.

Table of values

n a(n)
1 1
2 2
3 2
4 4
5 15
6 4
7 12
8 159
9 159
10 12
11 39
12 2191
13 7445
14 2191
15 39
16 138
17 30295
18 381958
19 381958
20 30295
21 138
22 499
23 421471
24 18691624
25 70985206
26 18691624
27 421471
28 499
29 1830
30 5797959
31 911680225
32 12341773443
33 12341773443
34 911680225
35 5797959
36 1830
37 6723
38 79367143

List of values

[1, 2, 2, 4, 15, 4, 12, 159, 159, 12, 39, 2191, 7445, 2191, 39, 138, 30295, 381958, 381958, 30295, 138, 499, 421471, 18691624, 70985206, 18691624, 421471, 499, 1830, 5797959, 911680225, 12341773443, 12341773443, 911680225, 5797959, 1830, 6723, 79367143]