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.

A201381 Number of nX5 0..1 arrays with rows and columns lexicographically nondecreasing and the instance counts of every value within one of each other.

This page as a plain text file.
%I A201381 #7 Jul 22 2025 16:12:48
%S A201381 2,9,115,483,7148,24779,295813,804538,7711613,17135660,137991357,
%T A201381 261853930,1838296465,3078156753,19352193027,29273561002,168059197372,
%U A201381 233637796573,1242746736360,1608517392555,8015798428649,9756858004272
%N A201381 Number of nX5 0..1 arrays with rows and columns lexicographically nondecreasing and the instance counts of every value within one of each other.
%C A201381 Column 5 of A201384
%H A201381 R. H. Hardin, <a href="/A201381/b201381.txt">Table of n, a(n) for n = 1..180</a>
%e A201381 Some solutions for n=6
%e A201381 ..0..0..0..1..1....0..0..0..1..1....0..0..0..0..1....0..0..0..1..1
%e A201381 ..0..0..1..0..0....0..0..1..0..1....0..0..1..1..1....0..0..1..0..0
%e A201381 ..0..0..1..0..1....0..1..0..1..0....0..1..0..0..1....0..0..1..0..1
%e A201381 ..0..1..1..1..1....0..1..1..1..1....1..1..0..0..0....0..1..1..1..1
%e A201381 ..1..0..1..0..1....1..0..1..0..0....1..1..0..1..0....1..0..0..0..0
%e A201381 ..1..1..0..1..0....1..1..1..0..0....1..1..0..1..1....1..1..1..1..1
%K A201381 nonn
%O A201381 1,1
%A A201381 _R. H. Hardin_ Nov 30 2011