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A202465
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Number of (n+2)X4 binary arrays with no more than two of any consecutive three bits set in any row or column
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1
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1573, 16561, 172197, 1774281, 18374521, 190112777, 1966463785, 20345296193, 210482281689, 2177526620233, 22527699867037, 233060360137857, 2411126165020333, 24944324990455409, 258061639015145685
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OFFSET
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1,1
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COMMENTS
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Column 2 of A202471
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LINKS
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R. H. Hardin, Table of n, a(n) for n = 1..210
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FORMULA
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Empirical: a(n) = 4*a(n-1) +36*a(n-2) +272*a(n-3) +350*a(n-4) +392*a(n-5) -3016*a(n-6) -164*a(n-7) -5522*a(n-8) +11427*a(n-9) -4608*a(n-10) +10140*a(n-11) -11817*a(n-12) +4108*a(n-13) -2432*a(n-14) +1176*a(n-15) -166*a(n-16) +124*a(n-17) -50*a(n-18) +4*a(n-19) -2*a(n-20) +a(n-21)
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EXAMPLE
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Some solutions for n=2
..1..0..0..1....0..0..1..1....1..0..1..0....0..1..0..1....1..0..1..0
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..1..1..0
..1..1..0..1....1..0..1..0....1..0..1..1....1..1..0..0....0..0..0..0
..0..0..0..1....0..0..0..1....1..0..0..0....1..0..1..1....0..1..0..0
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CROSSREFS
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Sequence in context: A221105 A236261 A252073 * A045291 A125014 A333950
Adjacent sequences: A202462 A202463 A202464 * A202466 A202467 A202468
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin Dec 19 2011
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STATUS
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approved
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