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 A251425 #6 Jul 23 2025 13:20:01 %S A251425 42,432,2532,18952,122452,791668,4868362,29782800,179832500, %T A251425 1084104408,6515269116,39138627524,234937479552,1410085029812, %U A251425 8461645099972,50774656443080,304660870764438,1828017536543716,10968256803665504 %N A251425 Number of length n+2 0..5 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 A251425 Column 5 of A251428 %H A251425 R. H. Hardin, <a href="/A251425/b251425.txt">Table of n, a(n) for n = 1..24</a> %e A251425 Some solutions for n=5 %e A251425 ..3....2....3....3....0....2....4....4....3....3....5....1....4....4....2....3 %e A251425 ..2....1....0....2....1....2....1....1....0....1....0....4....3....5....1....1 %e A251425 ..3....1....0....3....4....3....1....0....1....0....4....5....1....2....3....0 %e A251425 ..1....5....2....2....1....5....3....0....4....1....3....4....0....0....4....2 %e A251425 ..0....4....4....2....1....3....2....0....0....4....2....1....3....1....1....5 %e A251425 ..2....5....4....2....5....1....1....1....1....0....0....4....5....2....5....2 %e A251425 ..0....1....1....5....5....2....2....2....0....1....2....5....4....3....3....4 %K A251425 nonn %O A251425 1,1 %A A251425 _R. H. Hardin_, Dec 02 2014