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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A254518 Number of (7+2)X(n+2) 0..1 arrays with every 3X3 subblock sum of four medians of central row, central column, diagonal and antidiagonal nondecreasing horizontally, vertically and ne-to-sw antidiagonally 1

%I

%S 2977462,38770022,412719610,4179100619,55061190276,695661729709,

%T 8348810077730,102339687375431,1244134654250986,15035366666508525,

%U 180762598329110242,2171453851080392485,25981429998893241830

%N Number of (7+2)X(n+2) 0..1 arrays with every 3X3 subblock sum of four medians of central row, central column, diagonal and antidiagonal nondecreasing horizontally, vertically and ne-to-sw antidiagonally

%C Row 7 of A254512

%H R. H. Hardin, <a href="/A254518/b254518.txt">Table of n, a(n) for n = 1..60</a>

%e Some solutions for n=1

%e ..0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0

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

%e ..0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0

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

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 31 2015

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 March 21 16:33 EDT 2023. Contains 361408 sequences. (Running on oeis4.)