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 A251426 #5 Jul 23 2025 13:20:07 %S A251426 61,725,5097,44465,349257,2647405,19285211,137949185,976032575, %T A251426 6871688649,48247321093,338304918133,2370405542621,16602202832585, %U A251426 116254396792509,813946050011849,5698326553998227,39891307203318801 %N A251426 Number of length n+2 0..6 arrays with the sum of the maximum minus twice the median plus the minimum of adjacent triples multiplied by some arrangement of +-1 equal to zero. %C A251426 Column 6 of A251428 %e A251426 Some solutions for n=4 %e A251426 ..0....2....5....5....5....1....1....0....0....6....1....2....4....1....4....3 %e A251426 ..6....4....2....3....6....0....0....3....3....6....3....1....1....0....4....1 %e A251426 ..1....1....0....0....6....6....0....2....5....4....3....0....6....1....6....5 %e A251426 ..0....1....5....1....4....4....2....2....0....5....5....3....0....6....3....2 %e A251426 ..2....2....4....3....5....2....4....6....3....2....1....3....5....5....3....5 %e A251426 ..4....6....2....6....2....4....1....6....5....5....5....1....2....2....1....4 %K A251426 nonn %O A251426 1,1 %A A251426 _R. H. Hardin_, Dec 02 2014