login
A251481
T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock summing to a prime and those sums nondecreasing in every row and column
7
114, 586, 586, 2908, 3904, 2908, 12670, 24182, 24182, 12670, 54344, 123739, 183485, 123739, 54344, 218854, 609565, 1096596, 1096596, 609565, 218854, 874280, 2696488, 6216665, 7485767, 6216665, 2696488, 874280, 3378058, 11697274, 30592799
OFFSET
1,1
COMMENTS
Table starts
......114.......586........2908........12670........54344.......218854
......586......3904.......24182.......123739.......609565......2696488
.....2908.....24182......183485......1096596......6216665.....30592799
....12670....123739.....1096596......7485767.....48046512....261990105
....54344....609565.....6216665.....48046512....347024304...2095872247
...218854...2696488....30592799....261990105...2095872247..13874159417
...874280..11697274...146035292...1374831443..12096838874..87400242458
..3378058..47575204...638001419...6492635940..62069543650.484930994600
.12982168.191527226..2737224051..29922945960.308909778915
.48990334.740673411.11079334278.128376366657
LINKS
FORMULA
Empirical for column k:
k=1: [linear recurrence of order 16]
k=2: [order 61]
k=3: [order 99]
EXAMPLE
Some solutions for n=3 k=4
..0..2..1..1..0....0..0..0..2..0....0..0..0..1..1....2..2..0..1..2
..1..0..0..1..3....1..2..3..0..3....2..1..2..2..1....1..0..3..1..3
..2..0..3..1..0....0..0..0..2..2....0..0..0..1..1....2..2..0..1..2
..1..0..0..3..3....3..2..3..0..3....1..2..1..3..0....1..2..3..3..1
CROSSREFS
Sequence in context: A323758 A043403 A122279 * A251475 A292980 A126169
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Dec 02 2014
STATUS
approved