cp's OEIS Frontend

A250172 Number of length 7+1 0..n arrays with the sum of adjacent differences multiplied by some arrangement of +-1 equal to zero.

%I A250172 #6 Jul 23 2025 12:15:10
%S A250172 128,3517,32032,195927,810964,2810751,7989940,20567199,46931176,
%T A250172 100480363,198506588,375153177,669200436,1155420975,1910171088,
%U A250172 3080038929,4801129076,7337318733,10913397192,15974820909,22870564032
%N A250172 Number of length 7+1 0..n arrays with the sum of adjacent differences multiplied by some arrangement of +-1 equal to zero.
%C A250172 Row 7 of A250167
%H A250172 R. H. Hardin, <a href="/A250172/b250172.txt">Table of n, a(n) for n = 1..24</a>
%e A250172 Some solutions for n=4
%e A250172 ..0....1....1....1....1....2....2....2....1....0....0....1....1....2....0....1
%e A250172 ..1....0....1....1....2....2....2....0....4....1....0....0....1....1....1....3
%e A250172 ..2....1....1....1....3....1....3....1....0....2....4....4....0....2....2....3
%e A250172 ..3....1....4....1....2....3....1....2....1....4....3....3....4....1....2....1
%e A250172 ..1....0....4....2....3....4....0....1....2....4....0....0....3....3....1....1
%e A250172 ..2....4....2....1....0....4....0....4....2....2....3....3....0....1....3....3
%e A250172 ..0....1....0....3....2....0....4....1....2....1....3....1....4....1....4....2
%e A250172 ..0....1....3....1....1....0....0....0....1....2....2....3....1....0....4....3
%K A250172 nonn
%O A250172 1,1
%A A250172 _R. H. Hardin_, Nov 13 2014