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.

A213961 Number of n X n 0..7 matrices with row and column i=1..n having sum <= i*7.

This page as a plain text file.
%I A213961 #6 Jun 02 2025 08:04:35
%S A213961 8,1632,10301232,1876235252048,9770128253650761936,
%T A213961 1444750727564469383124521648
%N A213961 Number of n X n 0..7 matrices with row and column i=1..n having sum <= i*7.
%C A213961 Column 7 of A213962
%e A213961 Some solutions for n=4
%e A213961 ..1..0..2..0....7..0..0..0....3..0..1..0....1..5..1..0....0..4..1..2
%e A213961 ..0..5..0..2....0..7..7..0....4..1..0..0....3..7..2..0....0..3..3..4
%e A213961 ..2..5..4..3....0..5..7..7....0..0..7..0....0..2..1..1....5..0..5..2
%e A213961 ..0..4..1..4....0..1..1..1....0..1..2..4....3..0..4..4....1..5..0..0
%K A213961 nonn
%O A213961 1,1
%A A213961 _R. H. Hardin_ Jun 28 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.