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 A250929 Number of (n+1)X(2+1) 0..3 arrays with no 2X2 subblock having a diagonal absolute difference less than its antidiagonal absolute difference 1

%I

%S 1652,42776,1104364,28564788,739019204,19118642332,494596445284,

%T 12795148116004,331009178108944,8563174165025384,221528446755373556,

%U 5730918403801358436,148258276841071095144,3835426560297583949776

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

%C Column 2 of A250935

%H R. H. Hardin, <a href="/A250929/b250929.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 40*a(n-1) -475*a(n-2) +3392*a(n-3) -16134*a(n-4) +44165*a(n-5) -44214*a(n-6) -88218*a(n-7) +319624*a(n-8) -393886*a(n-9) +208973*a(n-10) +26874*a(n-11) -121797*a(n-12) +92658*a(n-13) -36825*a(n-14) +5454*a(n-15) +752*a(n-16)

%e Some solutions for n=2

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Nov 28 2014

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Last modified December 2 08:31 EST 2021. Contains 349437 sequences. (Running on oeis4.)