A251397 - OEIS

A251397

Number of (n+1)X(3+1) 0..3 arrays with no 2X2 subblock having the sum of its diagonal elements less than the absolute difference of its antidiagonal elements

%I #4 Dec 02 2014 13:43:47

%S 45542,8558283,1606734480,301644677965,56631282128854,

%T 10632092711682548,1996093452861010528,374751133066799206981,

%U 70356632879370619403610,13208914836753861239922613,2479871817922719729400520215

%N Number of (n+1)X(3+1) 0..3 arrays with no 2X2 subblock having the sum of its diagonal elements less than the absolute difference of its antidiagonal elements

%C Column 3 of A251402

%H R. H. Hardin, <a href="/A251397/b251397.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A251397/a251397.txt">Empirical recurrence of order 81</a>

%F Empirical recurrence of order 81 (see link above)

%e Some solutions for n=1

%e ..3..0..0..3....3..2..3..0....1..3..0..1....2..2..3..1....3..3..2..3

%e ..1..1..1..2....1..3..2..0....2..1..1..3....0..1..2..0....1..3..2..2

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 02 2014