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.

A229420 Number of 6X6 0..n zero-diagonal arrays with corresponding row and column sums equal.

This page as a plain text file.
%I A229420 #5 Jul 23 2025 05:44:20
%S A229420 1375952,23938685973,28256240134144,7093199984236625,
%T A229420 657759228191876016,30505804179367041217,850029945152225681408
%N A229420 Number of 6X6 0..n zero-diagonal arrays with corresponding row and column sums equal.
%C A229420 Row 6 of A229417
%e A229420 Some solutions for n=1
%e A229420 ..0..0..0..0..1..0....0..0..0..0..1..1....0..0..0..0..0..0....0..0..0..0..0..1
%e A229420 ..0..0..0..1..0..1....0..0..1..1..0..0....0..0..0..1..1..0....0..0..0..1..1..0
%e A229420 ..0..0..0..1..1..0....0..0..0..0..0..1....0..0..0..0..0..1....0..1..0..0..0..1
%e A229420 ..1..1..1..0..0..0....0..1..0..0..0..0....0..0..1..0..1..0....1..0..1..0..1..0
%e A229420 ..0..1..1..1..0..0....1..1..0..0..0..0....0..1..0..1..0..0....0..1..0..1..0..0
%e A229420 ..0..0..0..0..1..0....1..0..0..0..1..0....0..1..0..0..0..0....0..0..1..1..0..0
%K A229420 nonn
%O A229420 1,1
%A A229420 _R. H. Hardin_ Sep 22 2013

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

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