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 A214594 #15 Aug 26 2025 14:23:55
%S A214594 8,32,986,250042,493575042,7427553264322,841074553776240002,
%T A214594 708809429969357784359042,4431510042384136382251663178882,
%U A214594 205943724467315535144140586838561052162,71400892546992940004221531659013363645000504322
%N A214594 Number of nXnXn triangular 0..7 arrays with every horizontal row having the same average value.
%H A214594 R. H. Hardin, <a href="/A214594/b214594.txt">Table of n, a(n) for n = 1..48</a>
%F A214594 See A214595. - _M. F. Hasler_, Aug 21 2025
%e A214594 Some solutions for n=4
%e A214594 .....4........4........4........2........2........4........4........3
%e A214594 ....6.2......6.2......6.2......0.4......2.2......2.6......6.2......2.4
%e A214594 ...7.3.2....0.7.5....5.2.5....0.4.2....3.3.0....5.6.1....2.5.5....2.6.1
%e A214594 ..4.5.4.3..1.3.5.7..7.2.1.6..3.4.1.0..0.0.2.6..5.3.3.5..7.1.4.4..3.5.0.4
%o A214594 (PARI) apply( {A214594(n)=A214595(n, 7)}, [1..11]) \\ _M. F. Hasler_, Aug 21 2025
%Y A214594 Column 7 of A214595.
%K A214594 nonn,changed
%O A214594 1,1
%A A214594 _R. H. Hardin_, Jul 22 2012