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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A253863 T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with every 3X3 subblock diagonal maximum plus antidiagonal minimum nondecreasing horizontally and vertically 8

%I

%S 512,3264,3264,19456,30848,19456,114880,291392,291392,114880,660480,

%T 2654464,4186496,2654464,660480,3727552,22951616,54933632,54933632,

%U 22951616,3727552,20872192,196953728,700079360,1095205120,700079360

%N T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with every 3X3 subblock diagonal maximum plus antidiagonal minimum nondecreasing horizontally and vertically

%C Table starts

%C .......512.........3264..........19456...........114880.............660480

%C ......3264........30848.........291392..........2654464...........22951616

%C .....19456.......291392........4186496.........54933632..........700079360

%C ....114880......2654464.......54933632.......1095205120........21906994304

%C ....660480.....22951616......700079360......21906994304.......664082571648

%C ...3727552....196953728.....9090451328.....440235663616.....20237970640000

%C ..20872192...1698464064...118920758784....8790291559808....612253982192000

%C .116568256..14584992256..1541740409984..174215495453184..18456265054053248

%C .649733120.125182611904.20040279401216.3458303106355840.555946540182616960

%H R. H. Hardin, <a href="/A253863/b253863.txt">Table of n, a(n) for n = 1..179</a>

%F Empirical for column k:

%F k=1: [linear recurrence of order 11]

%F k=2: [order 29]

%F k=3: [order 70]

%e Some solutions for n=2 k=4

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

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

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

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

%K nonn,tabl

%O 1,1

%A _R. H. Hardin_, Jan 17 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 August 11 12:12 EDT 2022. Contains 356065 sequences. (Running on oeis4.)