# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a234670 Showing 1-1 of 1 %I A234670 #8 Jun 20 2022 19:45:56 %S A234670 229272,1648188,11826092,85076140,612823800,4421960468,31951474920, %T A234670 231249678820,1675919782860,12165195549188,88420148767440, %U A234670 643663869538676,4691581089095824,34248260363836644,250321059877067092 %N A234670 Number of (n+1) X (4+1) 0..7 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 4 (constant-stress 1 X 1 tilings). %H A234670 R. H. Hardin, Table of n, a(n) for n = 1..36 %e A234670 Some solutions for n=1: %e A234670 0 0 6 1 1 4 0 4 7 7 0 2 0 1 7 0 4 5 6 7 %e A234670 0 4 6 5 1 5 5 5 4 0 5 3 5 2 4 6 6 3 0 5 %Y A234670 Column 4 of A234672. %K A234670 nonn %O A234670 1,1 %A A234670 _R. H. Hardin_, Dec 29 2013 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE