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A240481
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Number of nX5 0..1 arrays with no element equal to more than two horizontal or vertical neighbors, with new values 0..1 introduced in row major order
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1
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16, 264, 2753, 29084, 306749, 3229199, 33986995, 357678069, 3764378216, 39618451066, 416967572821, 4388410582280, 46186206308887, 486090724065878, 5115903842989972, 53842772071906540, 566672906942431901
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OFFSET
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1,1
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COMMENTS
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LINKS
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FORMULA
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Empirical: a(n) = 11*a(n-1) +7*a(n-2) -123*a(n-3) -100*a(n-4) +564*a(n-5) +1376*a(n-6) -850*a(n-7) -2574*a(n-8) -15069*a(n-9) -48432*a(n-10) +116629*a(n-11) +324534*a(n-12) -546638*a(n-13) -1305652*a(n-14) +1415839*a(n-15) +2861430*a(n-16) -181783*a(n-17) +1142736*a(n-18) -3485531*a(n-19) +103541*a(n-20) +3757015*a(n-21) -3932650*a(n-22) -2493412*a(n-23) +1567853*a(n-24) +1326412*a(n-25) -3258442*a(n-26) -317605*a(n-27) -4294565*a(n-28) -451364*a(n-29) -983122*a(n-30) +1528646*a(n-31) +4998901*a(n-32) +2015845*a(n-33) -351008*a(n-34) +1590161*a(n-35) +241188*a(n-36) -1593888*a(n-37) -938771*a(n-38) -106281*a(n-39) +189935*a(n-40) +114894*a(n-41) -8940*a(n-42) -15519*a(n-43) +17746*a(n-44) +13164*a(n-45) -7056*a(n-46) -7716*a(n-47) +20*a(n-48) +1377*a(n-49) +35*a(n-50) -3*a(n-51) +38*a(n-52) -8*a(n-53) -4*a(n-54)
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EXAMPLE
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Some solutions for n=4
..0..0..0..1..0....0..0..0..0..1....0..0..0..1..1....0..0..0..1..1
..0..1..1..0..1....1..1..1..0..0....0..1..1..0..1....1..1..1..0..1
..0..1..0..0..1....1..0..0..1..0....0..1..0..0..1....1..0..0..1..0
..0..0..0..1..1....1..0..1..0..1....0..0..1..1..1....0..1..0..0..0
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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