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A235217 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 1

%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

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Last modified March 29 05:48 EDT 2024. Contains 371265 sequences. (Running on oeis4.)