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

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 60th year, we have over 367,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A205287 Number of (n+1) X 3 0..2 arrays with permanents of 2 X 2 subblocks differing from horizontal and vertical neighbor permanents. 1
476, 4836, 45914, 426086, 3972556, 37114078, 346714732, 3237486306, 30230183516, 282305473276, 2636314038108, 24618705261436, 229897151530304, 2146862068737044, 20048162744149976, 187216665973680704 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
FORMULA
Empirical: a(n) = 22*a(n-2) +279*a(n-3) +2320*a(n-4) +7325*a(n-5) +12556*a(n-6) -51279*a(n-7) -590177*a(n-8) -1833703*a(n-9) -2614972*a(n-10) +7352710*a(n-11) +70297378*a(n-12) +177302112*a(n-13) +98916360*a(n-14) -851338305*a(n-15) -4034342229*a(n-16) -6552791409*a(n-17) +4751864746*a(n-18) +44921050801*a(n-19) +88691971495*a(n-20) +9633752090*a(n-21) -239286047862*a(n-22) -569956342534*a(n-23) -309445183824*a(n-24) +1769737409734*a(n-25) +1058213619373*a(n-26) -2724259558572*a(n-27) -2377351079923*a(n-28) -15104678952027*a(n-29) +9612493659296*a(n-30) +69366218804618*a(n-31) +16985716577606*a(n-32) +64319982565720*a(n-33) -77434596102941*a(n-34) -402669184079140*a(n-35) +98275961917420*a(n-36) -307680648917635*a(n-37) -13544584663565*a(n-38) +888716198878970*a(n-39) -1489105566363021*a(n-40) +984914987115435*a(n-41) -11149182316534*a(n-42) +215725223372976*a(n-43) +4725176513212251*a(n-44) -694302590651162*a(n-45) +5011026262412361*a(n-46) -3631958309433376*a(n-47) +8525010167227720*a(n-48) -5292348148728917*a(n-49) +8496793851779663*a(n-50) +8328674833210444*a(n-51) -18389722132200385*a(n-52) +37224897940479114*a(n-53) -44268975396593159*a(n-54) +37113056918061524*a(n-55) -19908013971890284*a(n-56) -13221743549732005*a(n-57) +36732267764837544*a(n-58) -40688870903272654*a(n-59) +22178982189613447*a(n-60) +31821228718710768*a(n-61) -97780793569714224*a(n-62) +149970452784981334*a(n-63) -155237788080418475*a(n-64) +105315665475922953*a(n-65) -43154682698593079*a(n-66) -6228250039980914*a(n-67) +35960175966869167*a(n-68) -47571703983252260*a(n-69) +32469005005425122*a(n-70) -12204293705528322*a(n-71) -3750697874974749*a(n-72) +5474445082366456*a(n-73) -5056088944691868*a(n-74) +6498373444305800*a(n-75) -1907820953730520*a(n-76) +975137557006064*a(n-77) -939505351246368*a(n-78) +554635898990816*a(n-79) -672397448635264*a(n-80) +134933060529024*a(n-81) +105013710510336*a(n-82) -43036433954304*a(n-83) +4003986441216*a(n-84) for n>88
EXAMPLE
Some solutions for n=4
..0..1..1....0..0..2....1..2..0....0..1..2....2..1..1....1..0..2....2..1..2
..0..1..1....1..2..0....1..2..0....2..0..1....1..0..2....0..1..2....2..2..1
..1..2..1....1..2..0....1..1..1....2..2..1....2..2..1....0..1..1....2..2..1
..0..2..1....2..2..1....1..1..2....2..1..0....2..2..2....1..1..1....1..2..0
..2..2..2....2..2..1....2..1..2....2..0..0....0..0..1....2..0..0....1..1..2
CROSSREFS
Column 2 of A205293.
Sequence in context: A253395 A171077 A234077 * A236519 A205895 A235656
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 25 2012
STATUS
approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified December 3 05:03 EST 2023. Contains 367531 sequences. (Running on oeis4.)