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A238076 Number of (n+1)X(3+1) 0..3 arrays with the maximum plus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one 1

%I

%S 9884,132316,1781008,19616408,242829762,2981477664,39928365220,

%T 464223535984,5897707478324,71387175302572,942327270324172,

%U 11084134008458300,142393156886280476,1709380475111268484

%N Number of (n+1)X(3+1) 0..3 arrays with the maximum plus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one

%C Column 3 of A238081

%H R. H. Hardin, <a href="/A238076/b238076.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 34*a(n-2) +18283*a(n-4) +141114*a(n-6) -12910117*a(n-8) +14125360*a(n-10) +463818473*a(n-12) -7662186496*a(n-14) +19576186983*a(n-16) +194263482873*a(n-18) -2813916219997*a(n-20) +3440012097752*a(n-22) +40169200438949*a(n-24) -228392835488837*a(n-26) +276370071877258*a(n-28) +812617005002867*a(n-30) -4063453792653054*a(n-32) +2576412044215823*a(n-34) +11746089680694760*a(n-36) -20923169353248781*a(n-38) +2505623964080160*a(n-40) +22093450622115239*a(n-42) -29503791347615263*a(n-44) -2889242838806356*a(n-46) +22367048939386588*a(n-48) -9679702243656946*a(n-50) -9108522817595352*a(n-52) +1647268110309820*a(n-54) -409259228435168*a(n-56) -61960199779984*a(n-58) +2501255248992*a(n-60) for n>63

%e Some solutions for n=2

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 17 2014

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Last modified May 29 04:33 EDT 2020. Contains 334697 sequences. (Running on oeis4.)