This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A207224 Number of nX4 0..2 arrays avoiding the patterns z z+1 z or z z-1 z in any row, column or nw-se diagonal 1
 61, 3721, 100997, 3447649, 115679881, 3814387801, 125372637881, 4126073501121, 135963448993769, 4480839360430545, 147644379170646697, 4864581400227966369, 160280548163611896153, 5281079669610169252337, 174006141329285345485257 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 4 of A207228 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 EXAMPLE Some solutions for n=4 ..1..0..2..0....2..0..2..1....2..2..1..0....0..2..2..2....2..2..2..1 ..1..0..0..0....1..1..1..0....2..1..0..0....1..1..0..2....2..1..0..2 ..2..1..0..0....0..1..1..2....1..1..0..0....2..0..1..1....2..0..0..2 ..2..1..0..0....0..0..0..2....0..1..1..2....2..2..2..0....1..0..2..2 CROSSREFS Sequence in context: A135647 A269025 A207231 * A207011 A206975 A206969 Adjacent sequences:  A207221 A207222 A207223 * A207225 A207226 A207227 KEYWORD nonn AUTHOR R. H. Hardin Feb 16 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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.