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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.

A116542 Table B(m,n), read by antidiagonals, where B(m,n) is the number of ways integers 1,..,m*n can be put into an m X n grid so that every adjacent (NESW) pair of integers are coprime.

Table of values

n a(n)
1 1
2 2
3 2
4 6
5 8
6 6
7 12
8 16
9 16
10 12
11 72
12 432
13 2016
14 432
15 72
16 72
17 2784
18 23904
19 23904
20 2784
21 72
22 864
23 35712
24 7102656
25 19611648
26 7102656
27 35712
28 864

List of values

[1, 2, 2, 6, 8, 6, 12, 16, 16, 12, 72, 432, 2016, 432, 72, 72, 2784, 23904, 23904, 2784, 72, 864, 35712, 7102656, 19611648, 7102656, 35712, 864]

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

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