A230939 Number of white-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

42, 1312, 8450, 208172, 1604098, 41991510, 318984080, 8279222070, 62983913970, 1636647076866, 12449868229094, 323476245049122, 2460739904000374, 63937066423053164, 486382045071603570, 12637596474609429472

Offset

1,1

Comments

Column 7 of A230940

Links

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

Example

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

Crossrefs

Sequence in context: A001778 A111780 A075922 * A331858 A331805 A348775

Adjacent sequences: A230936 A230937 A230938 * A230940 A230941 A230942

Keyword

nonn

Author

R. H. Hardin, Nov 01 2013

Status

approved