login
A232204
T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every element both >= and <= some horizontal, vertical or antidiagonal neighbor
9
15, 109, 109, 685, 2129, 685, 4483, 39651, 39651, 4483, 29469, 745157, 2064527, 745157, 29469, 193531, 14015499, 108997581, 108997581, 14015499, 193531, 1270657, 263553379, 5765893981, 16237318767, 5765893981, 263553379, 1270657
OFFSET
1,1
COMMENTS
Table starts
......15........109............685..............4483.................29469
.....109.......2129..........39651............745157..............14015499
.....685......39651........2064527.........108997581............5765893981
....4483.....745157......108997581.......16237318767.........2425888162725
...29469...14015499.....5765893981.....2425888162725......1024215443152687
..193531..263553379...304936615565...362285582855051....432206209011195289
.1270657.4955798535.16125727718291.54098452658673021.182361235082538718699
LINKS
FORMULA
Empirical for column k:
k=1: [linear recurrence of order 12]
k=2: [order 38] for n>40
EXAMPLE
Some solutions for n=2 k=4
..0..1..1..0..0....0..0..2..2..2....0..1..0..2..2....0..0..2..2..2
..0..2..0..0..1....0..2..2..0..0....0..1..0..0..1....0..1..1..2..1
..0..2..1..0..1....1..2..2..2..2....0..0..0..1..1....0..0..0..0..0
CROSSREFS
Sequence in context: A243212 A365929 A232124 * A232117 A232197 A347500
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Nov 20 2013
STATUS
approved