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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A209098 Number of nX6 0..2 arrays with new values 0..2 introduced in row major order and no element equal to more than one of its immediate leftward or upward or right-upward antidiagonal neighbors 1

%I #5 Mar 31 2012 12:37:26

%S 122,24256,5171088,1118366188,242632290432,52675800891748,

%T 11437585318270860,2483525516352937680,539268195586029921832,

%U 117095796409143583455428,25425988916932630731090072

%N Number of nX6 0..2 arrays with new values 0..2 introduced in row major order and no element equal to more than one of its immediate leftward or upward or right-upward antidiagonal neighbors

%C Column 6 of A209100

%H R. H. Hardin, <a href="/A209098/b209098.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 300*a(n-1) -20582*a(n-2) +603924*a(n-3) -9449609*a(n-4) +91922233*a(n-5) -653230134*a(n-6) +4097861625*a(n-7) -24669590390*a(n-8) +130239438691*a(n-9) -543298308924*a(n-10) +1704347583868*a(n-11) -3917246807088*a(n-12) +6481693905844*a(n-13) -8041265672017*a(n-14) +9445340887084*a(n-15) -12785808828112*a(n-16) +12798888267640*a(n-17) -2070180454016*a(n-18) -7015258833920*a(n-19) +3949705789040*a(n-20) +2252604606848*a(n-21) -4177948981504*a(n-22) +3059510444288*a(n-23) -1376634560512*a(n-24) +343950082048*a(n-25) -46623096832*a(n-26) +4254072832*a(n-27) -150994944*a(n-28) for n>30

%e Some solutions for n=4

%e ..0..0..0..0..1..0....0..0..1..2..0..2....0..0..0..1..1..2....0..0..1..2..2..2

%e ..2..2..2..1..2..0....1..0..2..1..2..1....2..1..2..0..1..1....1..0..0..1..0..1

%e ..1..0..1..0..1..2....2..0..1..2..0..2....2..1..1..0..2..2....0..1..0..1..2..2

%e ..1..2..1..0..1..2....2..2..0..1..2..1....0..2..1..2..0..2....0..1..0..1..0..2

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 05 2012

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.

Last modified February 26 22:44 EST 2024. Contains 370354 sequences. (Running on oeis4.)