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A185528 Number of (n+2)X5 binary arrays with each 3X3 subblock nonsingular 1
3030, 25854, 215644, 1752120, 14532816, 120202866, 989438596, 8169865470, 67464328866, 556545963176, 4593012838936, 37910988424084, 312858679478906, 2581909286494056, 21308805468920754, 175858585110585566 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A185534

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..200

FORMULA

Empirical: a(n)=14*a(n-2)+482*a(n-3)+1025*a(n-4)-217*a(n-5)-71146*a(n-6)-203531*a(n-7)-278567*a(n-8)+4889000*a(n-9)+15798715*a(n-10)+26975584*a(n-11)-187650154*a(n-12)-645572934*a(n-13)-1028074198*a(n-14)+4660709659*a(n-15)+16419678725*a(n-16)+18939501561*a(n-17)-81499828302*a(n-18)-287187041859*a(n-19)-126349749166*a(n-20)+1020912770811*a(n-21)+3649586067565*a(n-22)-1632284441124*a(n-23)-8870607972806*a(n-24)-34265422200258*a(n-25)+46855962261393*a(n-26)+51253382423782*a(n-27)+231002034779743*a(n-28)-525145443847670*a(n-29)-207652748883695*a(n-30)-982594262684296*a(n-31)+3533208944132201*a(n-32)+886474234092441*a(n-33)+1024667138970214*a(n-34)-15540823125302911*a(n-35)-4959303001165722*a(n-36)+17838627784670658*a(n-37)+43898680145500598*a(n-38)+20682078486139944*a(n-39)-133982588467054524*a(n-40)-64700987949250430*a(n-41)-41816693524588761*a(n-42)+490671299006190632*a(n-43)-24171023019707515*a(n-44)-11638160101583578*a(n-45)-1099512809221431741*a(n-46)+308426845841737782*a(n-47)+306770873342717786*a(n-48)+1614125257034898601*a(n-49)-596297664601078697*a(n-50)-999428530208873550*a(n-51)-1545519377630339837*a(n-52)+563223831174360518*a(n-53)+1926062613807906026*a(n-54)+801496531513678312*a(n-55)-245014197051921096*a(n-56)-2369576686048709928*a(n-57)-39910152525929352*a(n-58)-54961445496297392*a(n-59)+1873218942039625728*a(n-60)+8704459065703808*a(n-61)-116485827363870976*a(n-62)-844275558556928000*a(n-63)-289759615136114688*a(n-64)+444986234214604800*a(n-65)+8776872879407104*a(n-66)+354446886908526592*a(n-67)-318933727378669568*a(n-68)+122827898481541120*a(n-69)-155919940098981888*a(n-70)+77739674440826880*a(n-71)-5295965258907648*a(n-72)

EXAMPLE

Some solutions for 4X5

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

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

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

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

CROSSREFS

Sequence in context: A252142 A031553 A031733 * A334371 A118652 A084719

Adjacent sequences:  A185525 A185526 A185527 * A185529 A185530 A185531

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 30 2011

STATUS

approved

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Last modified September 22 17:39 EDT 2021. Contains 347607 sequences. (Running on oeis4.)