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A239334 Number of nX2 0..3 arrays with no element equal to one plus the sum of elements to its left or three plus the sum of elements above it, modulo 4 1

%I #4 Mar 16 2014 12:45:56

%S 5,31,172,926,5078,27861,152260,832207,4550810,24881731,136029644,

%T 743697760,4065948624,22229220072,121530709245,664428372582,

%U 3632538661095,19859679158791,108576093277449,593603153333233

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

%C Column 2 of A239340

%H R. H. Hardin, <a href="/A239334/b239334.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 9*a(n-1) -28*a(n-2) +74*a(n-3) -181*a(n-4) +236*a(n-5) -261*a(n-6) +234*a(n-7) +200*a(n-8) -279*a(n-9) +104*a(n-10) -268*a(n-11) -36*a(n-12) +156*a(n-13) +104*a(n-14) -32*a(n-15) -16*a(n-16)

%e Some solutions for n=5

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Mar 16 2014

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Last modified June 21 13:18 EDT 2024. Contains 373544 sequences. (Running on oeis4.)