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.

A203491 T(n,k)=Number of nXk 0..2 arrays with row sums equal and column sums unequal to adjacent columns.

Table of values

n a(n)
1 3
2 6
3 3
4 12
5 10
6 3
7 24
8 80
9 36
10 3
11 48
12 556
13 624
14 82
15 3
16 96
17 3348
18 9540
19 3760
20 256
21 3
22 192
23 20596
24 170868
25 173860
26 25002
27 676
28 3
29 384
30 134412
31 3171708
32 8518564
33 3065704
34 171068
35 2050
36 3
37 768
38 888232
39 59683122
40 442135180
41 421158558
42 56438584
43 1107888

List of values

[3, 6, 3, 12, 10, 3, 24, 80, 36, 3, 48, 556, 624, 82, 3, 96, 3348, 9540, 3760, 256, 3, 192, 20596, 170868, 173860, 25002, 676, 3, 384, 134412, 3171708, 8518564, 3065704, 171068, 2050, 3, 768, 888232, 59683122, 442135180, 421158558, 56438584, 1107888]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.