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A240407 Number of nX2 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of elements above it or zero plus the sum of the elements diagonally to its northwest, modulo 4 1

%I

%S 2,10,33,139,529,2105,8258,32480,127944,503372,1982058,7801697,

%T 30716039,120917541,476048890,1874110143,7378197850,29046994153,

%U 114354774523,450201581068,1772392670851,6977710726893,27470462435959,108148134784975

%N Number of nX2 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of elements above it or zero plus the sum of the elements diagonally to its northwest, modulo 4

%C Column 2 of A240412

%H R. H. Hardin, <a href="/A240407/b240407.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 2*a(n-1) +11*a(n-2) -a(n-3) -39*a(n-4) -40*a(n-5) +3*a(n-6) +13*a(n-7) +64*a(n-8) +162*a(n-9) -220*a(n-10) +122*a(n-11) -38*a(n-12) -82*a(n-13) +60*a(n-14)

%e Some solutions for n=4

%e ..2..3....2..3....2..3....3..2....3..2....2..3....3..2....3..2....2..3....3..2

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Apr 04 2014

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Last modified October 21 01:18 EDT 2019. Contains 328291 sequences. (Running on oeis4.)