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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A252952 T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with every consecutive three elements in every row, column and nw-se diagonal having exactly two distinct values, and new values 0 upwards introduced in row major order 8
 198, 747, 747, 2970, 2988, 2970, 11943, 12915, 12915, 11943, 48024, 57978, 64242, 57978, 48024, 193059, 262494, 334197, 334197, 262494, 193059, 776160, 1192149, 1784781, 2101338, 1784781, 1192149, 776160, 3120579, 5419521, 9627372, 13646115 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts ......198.......747.......2970........11943.........48024..........193059 ......747......2988......12915........57978........262494.........1192149 .....2970.....12915......64242.......334197.......1784781.........9627372 ....11943.....57978.....334197......2101338......13646115........90331596 ....48024....262494....1784781.....13646115.....110574774.......919418760 ...193059...1192149....9627372.....90331596.....919418760......9729661266 ...776160...5419521...52118784....603797472....7763464440....104852356227 ..3120579..24648309..282725568...4053062745...66003601788...1141808774769 .12546540.112122162.1535104449..27261133281..563165929260..12498557877783 .50444415.510068277.8338827870.183573601551.4814005980501.137122697754648 LINKS R. H. Hardin, Table of n, a(n) for n = 1..127 FORMULA Empirical for column k: k=1: a(n) = 6*a(n-1) -9*a(n-2) +4*a(n-3) +2*a(n-4) -6*a(n-5) +4*a(n-6) k=2: [order 22] k=3: [order 61] for n>63 EXAMPLE Some solutions for n=3 k=4 ..0..0..1..1..2..1....0..0..1..1..0..0....0..0..1..0..0..1....0..0..1..0..1..0 ..0..2..2..1..2..2....2..1..1..2..1..2....1..0..1..1..2..1....2..0..2..2..0..0 ..1..2..2..0..0..1....0..1..0..1..1..2....0..2..2..0..2..0....2..1..1..2..1..1 ..1..0..0..1..0..1....2..2..1..1..2..1....1..0..1..0..1..1....1..0..1..1..0..1 ..0..2..0..0..2..2....0..1..0..0..1..1....1..0..1..1..2..1....2..0..0..2..0..2 CROSSREFS Sequence in context: A238765 A066218 A304614 * A252945 A158222 A156771 Adjacent sequences:  A252949 A252950 A252951 * A252953 A252954 A252955 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Dec 25 2014 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.

Last modified January 27 13:45 EST 2022. Contains 350607 sequences. (Running on oeis4.)