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 A214593 #10 Aug 21 2025 10:01:13 %S A214593 7,25,601,103651,121537201,971302214871,53475958137232241, %T A214593 20261509828593742587755,52256372938247946481045323041, %U A214593 909113988784102810475556803145162725 %N A214593 Number of nXnXn triangular 0..6 arrays with every horizontal row having the same average value. %H A214593 R. H. Hardin, <a href="/A214593/b214593.txt">Table of n, a(n) for n = 1..49</a> %e A214593 Some solutions for n=4 %e A214593 .....2........3........2........4........4........3........2........3 %e A214593 ....0.4......2.4......0.4......2.6......4.4......6.0......3.1......6.0 %e A214593 ...0.3.3....6.0.3....1.0.5....2.4.6....2.4.6....3.0.6....4.2.0....4.1.4 %e A214593 ..0.6.2.0..3.4.3.2..3.5.0.0..5.6.4.1..2.5.6.3..5.0.1.6..1.6.1.0..2.4.1.5 %Y A214593 Column 6 of A214595. %K A214593 nonn,changed %O A214593 1,1 %A A214593 _R. H. Hardin_, Jul 22 2012