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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A280480 T(n,k)=Number of nXk 0..2 arrays with no element unequal to a strict majority of its horizontal and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards. 12
 0, 1, 0, 0, 6, 0, 6, 22, 30, 0, 6, 63, 208, 158, 0, 30, 162, 997, 1939, 846, 0, 54, 381, 4070, 15104, 17406, 4446, 0, 158, 884, 15441, 100306, 214635, 149057, 22734, 0, 342, 1995, 55149, 618883, 2272190, 2886700, 1224092, 113310, 0, 846, 4478, 189470, 3589912 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,5 COMMENTS Table starts .0.......1.........0...........6............6...........30...........54 .0.......6........22..........63..........162..........381..........884 .0......30.......208.........997.........4070........15441........55149 .0.....158......1939.......15104.......100306.......618883......3589912 .0.....846.....17406......214635......2272190.....22475478....208736159 .0....4446....149057.....2886700.....48481917....767741328..11437392975 .0...22734...1224092....37224679....990070284..25082093017.599110195185 .0..113310...9717407...464804972..19550495121.792009247239 .0..552654..75078490..5658641517.375972018492 .0.2647390.567486429.67497024458 LINKS R. H. Hardin, Table of n, a(n) for n = 1..97 FORMULA Empirical for column k: k=1: a(n) = a(n-1) k=2: a(n) = 15*a(n-1) -87*a(n-2) +245*a(n-3) -348*a(n-4) +240*a(n-5) -64*a(n-6) k=3: [order 9] for n>10 k=4: [order 21] for n>22 k=5: [order 38] for n>39 Empirical for row n: n=1: a(n) = 3*a(n-1) +3*a(n-2) -11*a(n-3) -6*a(n-4) +12*a(n-5) +8*a(n-6) n=2: [order 8] for n>10 n=3: [order 26] for n>32 EXAMPLE Some solutions for n=4 k=4 ..0..0..0..0. .0..0..1..1. .0..0..0..0. .0..0..0..1. .0..0..1..1 ..1..1..0..0. .0..1..1..1. .1..1..0..0. .2..2..1..1. .1..1..0..0 ..0..0..1..2. .0..1..1..2. .1..0..2..2. .2..2..2..2. .0..0..0..0 ..1..1..2..2. .1..2..2..2. .2..2..1..1. .2..1..1..1. .2..0..0..0 CROSSREFS Row 1 is A279865. Sequence in context: A223033 A237444 A222918 * A223104 A222722 A222747 Adjacent sequences:  A280477 A280478 A280479 * A280481 A280482 A280483 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Jan 04 2017 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 November 29 04:38 EST 2021. Contains 349416 sequences. (Running on oeis4.)