login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A184684 Number of (n+1)X8 binary arrays with every 2X2 subblock singular 1
4240, 198352, 5858896, 212829840, 7079094288, 245133874960, 8344809419152, 286297979078416, 9790004471087504, 335277906309809680, 11474887935176701072, 392843564281607701264, 13447355724118720653712 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A184686

LINKS

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

FORMULA

Empirical: a(n)=92*a(n-1)-3003*a(n-2)+31550*a(n-3)+481077*a(n-4)-16442348*a(n-5)+135033835*a(n-6)+741942550*a(n-7)-20954527348*a(n-8)+102045857556*a(n-9)+713666898352*a(n-10)-9716258869416*a(n-11)+17186451128624*a(n-12)+289681963920496*a(n-13)-1691497400814000*a(n-14)-1882402290967680*a(n-15)+44882201430699072*a(n-16)-88390630163330944*a(n-17)-542851169447838720*a(n-18)+2525834335158943232*a(n-19)+1800071397226896384*a(n-20)-31289408691912675328*a(n-21)+34310775517304918016*a(n-22)+211668243392493412352*a(n-23)-536751356055340597248*a(n-24)-697198118444155895808*a(n-25)+3759507207074723397632*a(n-26)-371921969188297506816*a(n-27)-15556432037802748149760*a(n-28)+14098583304108343558144*a(n-29)+39191202165496466112512*a(n-30)-65162825849586994642944*a(n-31)-54093570021181637001216*a(n-32)+163171603653081197182976*a(n-33)+15034165722787050684416*a(n-34)-251239947541401976176640*a(n-35)+80289291422456883445760*a(n-36)+240497400256778289020928*a(n-37)-147758813741492778041344*a(n-38)-136386373557801378119680*a(n-39)+123382364965405429071872*a(n-40)+39172341838880698269696*a(n-41)-55109077889398981263360*a(n-42)-2090409433165310459904*a(n-43)+12438820010657417527296*a(n-44)-1370765122182385238016*a(n-45)-1078080685999204073472*a(n-46)+198446613980453535744*a(n-47)

EXAMPLE

Some solutions for 3X8

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

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

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

CROSSREFS

Sequence in context: A035783 A108007 A254880 * A204872 A204638 A205995

Adjacent sequences:  A184681 A184682 A184683 * A184685 A184686 A184687

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 19 2011

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified January 22 02:46 EST 2022. Contains 350481 sequences. (Running on oeis4.)