A230934 Number of black-square subarrays of (n+2)X(7+2) 0..3 arrays x(i,j) with each element diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 4, no adjacent elements equal, and upper left element zero

208, 1312, 27106, 208172, 5528862, 41991510, 1088383766, 8279222070, 215159062492, 1636647076866, 42522830419102, 323476245049122, 8404831728294292, 63937066423053164, 1661266085981748266

Offset

1,1

Comments

Column 7 of A230935

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions for n=4
..x..0..x..0..x..0..x..2..x....x..0..x..0..x..0..x..0..x
..3..x..1..x..1..x..1..x..3....3..x..1..x..3..x..1..x..2
..x..2..x..2..x..2..x..0..x....x..2..x..0..x..2..x..3..x
..1..x..3..x..1..x..3..x..3....1..x..1..x..1..x..0..x..2
..x..0..x..2..x..2..x..2..x....x..2..x..0..x..3..x..1..x
..3..x..1..x..1..x..1..x..1....1..x..3..x..2..x..2..x..0

Crossrefs

Sequence in context: A234543 A233665 A233659 * A236272 A184681 A235674

Adjacent sequences: A230931 A230932 A230933 * A230935 A230936 A230937

Keyword

nonn

Author

R. H. Hardin, Nov 01 2013

Status

approved