%I #4 Jan 05 2014 07:15:55
%S 427,8029,145669,2667851,48751703,891368897,16295474229,297913907755,
%T 5446419329019,99570851829557,1820342723277569,33279297670712375,
%U 608408300083251131,11122850784139833541,203346682381621540533
%N Number of (n+1)X(2+1) 0..2 arrays with 2X2 edge jumps all no more than +1 in one of the clockwise or counterclockwise directions or both
%C Column 2 of A235223
%H R. H. Hardin, <a href="/A235217/b235217.txt">Table of n, a(n) for n = 1..210</a>
%F Empirical: a(n) = 16*a(n-1) +52*a(n-2) -188*a(n-3) -10*a(n-4) +188*a(n-5) -29*a(n-6) -40*a(n-7) +10*a(n-8)
%e Some solutions for n=3
%e ..1..1..2....1..1..1....0..1..2....0..2..1....0..1..1....0..0..2....0..0..0
%e ..1..2..1....1..2..1....1..0..1....0..1..0....0..1..1....0..1..2....0..1..2
%e ..2..2..2....1..2..2....1..1..1....1..2..1....1..1..1....2..2..2....1..2..1
%e ..1..1..1....1..2..2....1..1..0....0..0..1....2..2..0....1..1..0....1..2..2
%K nonn
%O 1,1
%A _R. H. Hardin_, Jan 05 2014
|