|
|
A187621
|
|
Number of (n+1)X(n+1) 0..1 arrays with each 2X2 non-center subblock determinant nonzero and the array of 2X2 subblock determinants antisymmetric under 90 degree rotation
|
|
0
|
|
|
10, 24, 2, 948, 36, 190972, 3020, 194618700, 929380, 1018751442652, 1744283776, 27189851221308572, 15262275217840
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
EXAMPLE
|
All solutions for 4X4
..1..1..0..1....1..0..1..1
..0..1..1..1....1..1..1..0
..1..1..1..0....0..1..1..1
..1..0..1..1....1..1..0..1
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|