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.

A229429 Number of ways to label the cells of an m-by-n grid such that no (orthogonally) adjacent cells have adjacent labels; square array A(m,n) read by antidiagonals.

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 1
5 1
6 1
7 0
8 0
9 1
10 1
11 0
12 0
13 0
14 1
15 1
16 2
17 24
18 24
19 2
20 1
21 1
22 14
23 1660
24 12072
25 1660
26 14
27 1
28 1
29 90
30 160524
31 16595940
32 16595940
33 160524
34 90
35 1
36 1
37 646
38 21914632
39 46053512896
40 696497375736
41 46053512896
42 21914632
43 646
44 1

List of values

[1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 0, 0, 0, 1, 1, 2, 24, 24, 2, 1, 1, 14, 1660, 12072, 1660, 14, 1, 1, 90, 160524, 16595940, 16595940, 160524, 90, 1, 1, 646, 21914632, 46053512896, 696497375736, 46053512896, 21914632, 646, 1]