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

 Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 60th year, we have over 367,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”). Other ways to Give
 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A220146 Number of n X n arrays of the minimum value of corresponding elements and their horizontal or diagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 n X n array 0

%I #5 Dec 18 2015 18:18:23

%S 3,11,77,1174,34959,3057777,822242009,671848868714

%N Number of n X n arrays of the minimum value of corresponding elements and their horizontal or diagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 n X n array

%C Diagonal of A220153

%e Some solutions for n=3

%e ..0..0..1....1..0..0....0..0..0....0..0..0....0..0..1....0..0..0....2..1..1

%e ..0..0..0....1..0..0....1..0..0....0..0..0....0..0..0....1..1..0....2..1..1

%e ..2..2..0....2..1..1....1..0..0....2..2..0....1..1..0....2..1..2....2..2..2

%K nonn

%O 1,1

%A _R. H. Hardin_ Dec 06 2012

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 December 6 18:25 EST 2023. Contains 367614 sequences. (Running on oeis4.)