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!)
A255091 T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with no 3x3 subblock diagonal sum 1 and no antidiagonal sum 2 and no row sum 0 and no column sum 0 9

%I #4 Feb 14 2015 10:48:24

%S 108,265,265,623,522,623,1483,964,964,1483,3658,2005,1824,2005,3658,

%T 8830,4405,3696,3696,4405,8830,21442,9989,8631,9484,8631,9989,21442,

%U 51939,22601,20972,24034,24034,20972,22601,51939,125961,50980,50587,63535

%N T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with no 3x3 subblock diagonal sum 1 and no antidiagonal sum 2 and no row sum 0 and no column sum 0

%C Table starts

%C ....108....265....623....1483.....3658.....8830.....21442......51939

%C ....265....522....964....2005.....4405.....9989.....22601......50980

%C ....623....964...1824....3696.....8631....20972.....50587.....121381

%C ...1483...2005...3696....9484....24034....63535....169879.....457314

%C ...3658...4405...8631...24034....70938...211945....644545....1975790

%C ...8830...9989..20972...63535...211945...753882...2657415....9064874

%C ..21442..22601..50587..169879...644545..2657415..10823026...41029852

%C ..51939..50980.121381..457314..1975790..9064874..41029852..176178559

%C .125961.114903.289648.1242486..5959612.29870755.147005440..707838529

%C .305879.261406.701088.3394161.17859777.97410200.528612584.2852501049

%H R. H. Hardin, <a href="/A255091/b255091.txt">Table of n, a(n) for n = 1..967</a>

%F Empirical for column k:

%F k=1: [linear recurrence of order 20] for n>23

%F k=2: [order 80] for n>84

%F k=3: [order 34] for n>39

%F k=4: [order 39] for n>45

%F k=5: [order 42] for n>51

%F k=6: [order 48] for n>56

%F k=7: [order 54] for n>63

%e Some solutions for n=4 k=4

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

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

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

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

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

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

%K nonn,tabl

%O 1,1

%A _R. H. Hardin_, Feb 14 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 24 06:14 EDT 2024. Contains 371918 sequences. (Running on oeis4.)