This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A279704 Number of n X 3 0..1 arrays with no element equal to a strict majority of its horizontal and antidiagonal neighbors and with new values introduced in order 0 sequentially upwards. 1
 1, 3, 11, 42, 161, 617, 2364, 9057, 34699, 132938, 509309, 1951253, 7475596, 28640333, 109726191, 420380482, 1610552121, 6170310577, 23639553244, 90567317577, 346979442819, 1329339732698, 5092936084549, 19511940644893 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 5*a(n-1) - 5*a(n-2) + 2*a(n-3). Empirical g.f.: x*(1 - x)^2 / (1 - 5*x + 5*x^2 - 2*x^3). - Colin Barker, Feb 11 2019 EXAMPLE Some solutions for n=4: ..0..1..0. .0..1..0. .0..1..0. .0..1..0. .0..1..1. .0..1..0. .0..1..1 ..0..1..0. .1..0..1. .0..1..0. .0..1..1. .0..0..1. .0..1..0. .0..0..1 ..1..0..1. .1..0..1. .0..0..1. .1..0..0. .1..0..0. .1..0..0. .0..1..1 ..1..0..1. .0..1..0. .1..0..1. .0..1..0. .1..1..0. .1..1..0. .0..0..1 CROSSREFS Column 3 of A279709. Sequence in context: A077830 A106460 A319512 * A301483 A059716 A122368 Adjacent sequences:  A279701 A279702 A279703 * A279705 A279706 A279707 KEYWORD nonn AUTHOR R. H. Hardin, Dec 17 2016 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 April 25 21:06 EDT 2019. Contains 322461 sequences. (Running on oeis4.)