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A204957 Number of (n+1)X4 0..1 arrays with rows and columns of permanents of all 2X2 subblocks lexicographically nondecreasing 1
156, 1436, 12714, 103106, 807253, 5988660, 43018570, 298869279, 2027295942, 13463590124, 87975867196, 567211697987, 3618996194685, 22898470921003, 143947968870035, 900332163552591, 5609247838962276, 34842167045880902 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A204962

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

FORMULA

Empirical: a(n) = 13*a(n-1) +26*a(n-2) -942*a(n-3) +1072*a(n-4) +31922*a(n-5) -73891*a(n-6) -672895*a(n-7) +2033384*a(n-8) +9896336*a(n-9) -35279245*a(n-10) -107906005*a(n-11) +437743460*a(n-12) +904114764*a(n-13) -4125410961*a(n-14) -5947046193*a(n-15) +30595018537*a(n-16) +31046932755*a(n-17) -182740316161*a(n-18) -128725744465*a(n-19) +893276860664*a(n-20) +417952667814*a(n-21) -3614599537428*a(n-22) -1014261746248*a(n-23) +12206213996692*a(n-24) +1555587352772*a(n-25) -34592011855092*a(n-26) +48394562444*a(n-27) +82559463728176*a(n-28) -9296049200248*a(n-29) -166215922360112*a(n-30) +35060544908256*a(n-31) +282255765651136*a(n-32) -84688904646400*a(n-33) -403490531235392*a(n-34) +154512097139520*a(n-35) +483631528698112*a(n-36) -223642823926656*a(n-37) -482935673880832*a(n-38) +261527127665664*a(n-39) +397892011986944*a(n-40) -248356814977024*a(n-41) -266662681356288*a(n-42) +191019228858368*a(n-43) +142285015121920*a(n-44) -117925581316096*a(n-45) -58391359143936*a(n-46) +57519284879360*a(n-47) +17294468382720*a(n-48) -21625642156032*a(n-49) -3162654638080*a(n-50) +6030864941056*a(n-51) +131464167424*a(n-52) -1171135660032*a(n-53) +93180657664*a(n-54) +140802785280*a(n-55) -22900899840*a(n-56) -7851737088*a(n-57) +1811939328*a(n-58)

EXAMPLE

Some solutions for n=4

..0..1..1..0....1..1..1..1....1..1..1..0....1..0..0..1....0..0..1..0

..1..1..0..1....1..1..1..1....0..1..0..1....1..0..0..1....0..1..1..1

..1..0..1..1....1..1..1..1....1..0..1..1....1..0..0..1....0..1..1..1

..0..1..1..1....1..1..1..1....1..1..0..1....1..0..1..0....1..1..0..1

..1..1..1..1....1..1..1..1....0..1..1..1....1..1..0..0....1..0..1..1

CROSSREFS

Sequence in context: A304619 A204718 A232718 * A263305 A235849 A235843

Adjacent sequences:  A204954 A204955 A204956 * A204958 A204959 A204960

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 20 2012

STATUS

approved

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Last modified May 15 23:51 EDT 2022. Contains 353687 sequences. (Running on oeis4.)