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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A303889 Number of n X n 0..1 arrays with every element unequal to 1, 2, 3 or 4 king-move adjacent elements, with upper left element zero. 0
 0, 7, 54, 1659, 29479, 1541443, 71307109, 5846922441, 668263785713, 103693982275562 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Diagonal of A303896. LINKS EXAMPLE Some solutions for n=5 ..0..0..0..1..1. .0..1..1..1..0. .0..0..1..1..1. .0..1..1..0..1 ..1..0..0..1..0. .0..0..1..1..1. .1..1..1..1..0. .0..1..1..1..0 ..1..0..1..1..0. .0..0..0..0..0. .0..1..0..0..0. .1..1..1..0..0 ..0..0..1..1..1. .1..0..0..0..0. .1..0..0..0..1. .0..1..0..0..0 ..0..1..0..0..1. .0..1..0..1..1. .0..0..1..1..1. .1..0..0..0..1 CROSSREFS Cf. A303896. Sequence in context: A298104 A289865 A182124 * A198149 A203878 A043077 Adjacent sequences:  A303886 A303887 A303888 * A303890 A303891 A303892 KEYWORD nonn AUTHOR R. H. Hardin, May 02 2018 STATUS approved

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 June 27 04:16 EDT 2022. Contains 354888 sequences. (Running on oeis4.)