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.

A268423 T(n,k)=Number of nXk 0..3 arrays with every repeated value in every row unequal to the previous repeated value, and in every column equal 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 5
7 12
8 159
9 187
10 14
11 39
12 2191
13 9054
14 2530
15 44
16 138
17 30295
18 494098
19 467899
20 34195
21 147
22 499
23 421471
24 25770278
25 92967597
26 22309009
27 448667
28 505
29 1830
30 5797959
31 1339895662
32 17282463434
33 15615613747
34 999810316
35 5720450
36 1750
37 6723
38 79367143

List of values

[1, 2, 2, 4, 15, 5, 12, 159, 187, 14, 39, 2191, 9054, 2530, 44, 138, 30295, 494098, 467899, 34195, 147, 499, 421471, 25770278, 92967597, 22309009, 448667, 505, 1830, 5797959, 1339895662, 17282463434, 15615613747, 999810316, 5720450, 1750, 6723, 79367143]