|
|
A251787
|
|
Number of (n+2)X(4+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 2 3 6 or 7
|
|
1
|
|
|
6144, 14908, 44504, 149364, 541656, 1765074, 6446816, 24880436, 90369250, 354040208, 1437800720, 5668460910, 23255195002, 97097665658, 400041205158, 1677704911872, 7090646094602, 29794962043796, 126115432891882
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
EXAMPLE
|
Some solutions for n=4
..0..1..0..0..0..0....2..1..1..2..2..1....0..0..0..0..0..0....0..2..2..0..3..1
..0..0..0..1..0..0....0..0..0..0..0..1....0..0..0..0..0..0....1..0..3..1..0..3
..1..0..0..0..0..0....3..3..3..3..3..2....0..1..0..0..0..1....3..2..0..3..2..0
..0..0..0..0..0..0....1..2..2..1..2..2....0..0..0..1..0..0....0..3..1..0..3..2
..0..1..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0....1..0..3..2..0..3
..0..0..0..0..0..1....3..3..3..3..3..3....0..0..0..0..1..0....3..2..0..3..2..0
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|