login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo

Please make a donation to keep the OEIS running. We are now in our 56th year. In the past year we added 10000 new sequences and reached almost 9000 citations (which often say "discovered thanks to the OEIS").
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A205895 Number of 3X(n+1) 0..2 arrays with 2X2 subblock determinants differing from horizontal neighbors and permanents differing from vertical neighbors 1
476, 6020, 79644, 1042382, 13544456, 176994692, 2306581930, 30091040770, 392413398860, 5118080533042, 66749915011740, 870564329275570, 11354001135466616, 148080426962160126, 1931284128582993192 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 2 of A205894

LINKS

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

FORMULA

Empirical: a(n) = 86*a(n-2) +760*a(n-3) +3738*a(n-4) +9250*a(n-5) +a(n-6) -91063*a(n-7) -361635*a(n-8) -436943*a(n-9) +545180*a(n-10) +1606007*a(n-11) -149237*a(n-12) -10835274*a(n-13) -8365056*a(n-14) +44179189*a(n-15) +68051483*a(n-16) -6957442*a(n-17) +198448706*a(n-18) -146999105*a(n-19) -544154048*a(n-20) +1098204290*a(n-21) -2585983256*a(n-22) +3394264711*a(n-23) -7112934200*a(n-24) +10220938911*a(n-25) -17676476120*a(n-26) +25686964067*a(n-27) -28974983280*a(n-28) +36101512820*a(n-29) -52062360186*a(n-30) +80356912008*a(n-31) -87054253395*a(n-32) +66459295760*a(n-33) -49224652363*a(n-34) +41257909396*a(n-35) -44546129363*a(n-36) +48770005992*a(n-37) -48882437796*a(n-38) +41497764875*a(n-39) -28207003189*a(n-40) +15301727220*a(n-41) -1145788038*a(n-42) -9390031300*a(n-43) +14075254039*a(n-44) -12164782493*a(n-45) +9366980411*a(n-46) -6563228511*a(n-47) +4321925900*a(n-48) -2380585725*a(n-49) +937035245*a(n-50) +96707209*a(n-51) -343995886*a(n-52) +296944264*a(n-53) -127738242*a(n-54) +30366396*a(n-55) +3756128*a(n-56) -7056960*a(n-57) +1710592*a(n-58) -471264*a(n-59) for n>63

EXAMPLE

Some solutions for n=3

..0..0..2..0....2..1..1..1....2..0..1..2....1..2..1..1....0..1..2..0

..0..2..0..1....1..0..1..0....1..2..0..1....1..0..1..2....2..2..0..2

..2..0..1..0....0..2..2..2....2..2..2..2....2..1..2..2....2..0..1..2

CROSSREFS

Sequence in context: A234077 A205287 A236519 * A235656 A264290 A181228

Adjacent sequences:  A205892 A205893 A205894 * A205896 A205897 A205898

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 01 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified December 3 20:56 EST 2020. Contains 338920 sequences. (Running on oeis4.)