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A210400
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Number of (n+1)X5 0..3 arrays with every 2X2 subblock having one or three distinct values, and new values 0..3 introduced in row major order
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1
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5167, 668468, 85979301, 11066406572, 1424263182001, 183306323524536, 23591974220786341, 3036345393226822100, 390785152751306461721, 50295014602827775685072, 6473092633661117168123757
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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) = 222*a(n-1) -14466*a(n-2) +294924*a(n-3) +4656995*a(n-4) -258980402*a(n-5) +1519478244*a(n-6) +65765309856*a(n-7) -899946571108*a(n-8) -6066410464024*a(n-9) +162105406266400*a(n-10) -88886529769536*a(n-11) -13947758522827904*a(n-12) +56368494845199616*a(n-13) +595808254992314112*a(n-14) -4168954910728206336*a(n-15) -10590192881040593920*a(n-16) +140772489264317126656*a(n-17) -38165648086702518272*a(n-18) -2466112169355411496960*a(n-19) +4370610701672862203904*a(n-20) +22131193152696389959680*a(n-21) -66520641034825424371712*a(n-22) -84130431929983157141504*a(n-23) +444218891805352251097088*a(n-24) -24524753263238930497536*a(n-25) -1357521916200660102021120*a(n-26) +906383329842391263739904*a(n-27) +1679955754896158917394432*a(n-28) -1768503113779591826636800*a(n-29) -469035266983925668380672*a(n-30) +970910637009369175162880*a(n-31) -255356668034757049712640*a(n-32)
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EXAMPLE
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Some solutions for n=4
..0..0..0..0..1....0..0..0..0..0....0..1..0..0..0....0..1..0..0..0
..2..1..3..1..2....0..0..0..0..0....2..0..2..3..1....0..2..0..0..0
..1..3..2..2..0....1..2..1..3..1....2..1..2..0..3....3..2..3..1..2
..2..2..1..3..0....1..3..3..0..1....0..0..0..3..2....1..1..2..1..3
..1..3..2..2..2....0..0..1..0..2....0..0..0..2..0....0..2..0..1..2
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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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