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.

A220582 Equals one maps: number of 4Xn binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal and antidiagonal neighbors in a random 0..1 4Xn array.

This page as a plain text file.
%I A220582 #5 Jul 23 2025 01:15:09
%S A220582 1,128,375,17505,165130,2652007,33180533,450926562,5905274893,
%T A220582 77665021467
%N A220582 Equals one maps: number of 4Xn binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal and antidiagonal neighbors in a random 0..1 4Xn array.
%C A220582 Row 4 of A220579
%e A220582 Some solutions for n=3
%e A220582 ..1..0..1....1..1..0....1..0..1....1..0..1....1..0..1....1..1..0....1..1..1
%e A220582 ..1..0..0....0..0..1....1..0..0....1..1..1....1..1..1....0..0..1....1..0..0
%e A220582 ..0..1..1....1..1..0....0..0..0....1..0..1....1..1..0....1..1..1....0..0..1
%e A220582 ..1..1..0....0..1..0....0..0..1....1..1..1....0..1..1....1..0..1....1..0..1
%K A220582 nonn
%O A220582 1,2
%A A220582 _R. H. Hardin_ Dec 16 2012

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

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