A230947 Number of (n+3)X(6+3) 0..3 white square subarrays x(i,j) with each element diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 4, and upper left element zero

4584, 76682, 8838040, 161835904, 15744800360, 295706164414, 29418861515276, 546918612768188, 54302516885868700, 1012217881734520402, 100529076003975579204, 1872900054912118231160, 185992129163581425898076

Offset

1,1

Comments

Column 6 of A230949

Links

R. H. Hardin, Table of n, a(n) for n = 1..110

Example

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

Crossrefs

Sequence in context: A252099 A252405 A252580 * A205231 A231022 A251385

Adjacent sequences: A230944 A230945 A230946 * A230948 A230949 A230950

Keyword

nonn

Author

R. H. Hardin, Nov 01 2013

Status

approved