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.
%I A201235 #7 Jul 22 2025 16:10:36 %S A201235 4,6,6,7,2,7,3,34,34,3,17,24,114,24,17,40,306,140,140,306,40,46,152, %T A201235 2462,1028,2462,152,46,21,2697,18056,7791,7791,18056,2697,21,135,1709, %U A201235 62133,66027,420662,66027,62133,1709,135,342,26353,82861,508368,8499558 %N A201235 T(n,k)=Number of nXk 0..3 arrays with every row and column running average nondecreasing rightwards and downwards, and the number of instances of each value within one of each other. %C A201235 Table starts %C A201235 ...4.....6........7.........3...........17............40............46 %C A201235 ...6.....2.......34........24..........306...........152..........2697 %C A201235 ...7....34......114.......140.........2462.........18056.........62133 %C A201235 ...3....24......140......1028.........7791.........66027........508368 %C A201235 ..17...306.....2462......7791.......420662.......8499558......77620598 %C A201235 ..40...152....18056.....66027......8499558......33222962....4442977704 %C A201235 ..46..2697....62133....508368.....77620598....4442977704..112920979339 %C A201235 ..21..1709....82861...4293464....263388703...17052604235.1076710643794 %C A201235 .135.26353..1593643..33177954..14079281158.2254057282528 %C A201235 .342.14274.11978376.282310785.283246971698 %H A201235 R. H. Hardin, <a href="/A201235/b201235.txt">Table of n, a(n) for n = 1..111</a> %e A201235 Some solutions for n=3 k=7 %e A201235 ..0..0..0..1..2..1..3....0..0..0..1..2..1..3....0..0..0..0..0..1..1 %e A201235 ..0..0..1..1..2..2..3....0..1..1..1..2..2..3....0..2..1..3..3..3..2 %e A201235 ..0..1..2..3..2..3..3....0..3..3..2..2..3..3....1..1..2..3..2..3..2 %Y A201235 Column 1 is A200939 %K A201235 nonn,tabl %O A201235 1,1 %A A201235 _R. H. Hardin_ Nov 28 2011