A235244 - OEIS

A235244

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 6, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).

%I #10 Jun 20 2022 21:30:53

%S 16150,41246,108374,338282,1039502,3521538,11626526,41097666,

%T 141434374,515121002,1826965054,6821774074,24807303134,94706874378,

%U 352039395094,1371301958834,5197451865566,20616621173346,79485584533838

%N 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 6, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).

%C Column 4 of A235248.

%H R. H. Hardin, <a href="/A235244/b235244.txt">Table of n, a(n) for n = 1..193</a>

%H R. H. Hardin, <a href="/A235244/a235244.txt">Empirical recurrence of order 61</a>

%F Empirical recurrence of order 61 (see link above).

%e Some solutions for n=3:

%e 3 4 7 3 7 6 2 4 0 3 2 6 4 6 2 6 3 4 2 5

%e 0 7 4 6 4 5 7 3 5 2 3 1 5 1 3 4 7 2 6 3

%e 1 2 5 1 5 6 2 4 0 3 0 4 2 4 0 5 2 3 1 4

%e 0 7 4 6 4 3 5 1 3 0 2 0 4 0 2 4 7 2 6 3

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 05 2014