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

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A254457 T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with every 3X3 subblock diagonal maximum minus antidiagonal median nondecreasing horizontally and vertically 8

%I #4 Jan 30 2015 14:51:56

%S 512,3036,3036,16240,26380,16240,76832,196684,196684,76832,348032,

%T 1279568,2085712,1279568,348032,1511152,8004340,19716320,19716320,

%U 8004340,1511152,6440848,48345120,180449544,275772848,180449544,48345120

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

%C Table starts

%C .....512......3036.......16240........76832.........348032..........1511152

%C ....3036.....26380......196684......1279568........8004340.........48345120

%C ...16240....196684.....2085712.....19716320......180449544.......1621936236

%C ...76832...1279568....19716320....275772848.....3694478768......48236381800

%C ..348032...8004340...180449544...3694478768....71814202464....1361600709160

%C .1511152..48345120..1621936236..48236381800..1361600709160...37859718002056

%C .6440848.289945200.14531913928.623402653056.25559706957728.1041397026476012

%H R. H. Hardin, <a href="/A254457/b254457.txt">Table of n, a(n) for n = 1..219</a>

%F Empirical for column k:

%F k=1: [linear recurrence of order 32]

%F k=2: [order 47] for n>61

%F k=3: [order 73] for n>90

%e Some solutions for n=2 k=4

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

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

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

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

%Y Column 1 is A254161

%K nonn,tabl

%O 1,1

%A _R. H. Hardin_, Jan 30 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.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 23 18:16 EDT 2024. Contains 371916 sequences. (Running on oeis4.)