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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 1
4584, 76682, 8838040, 161835904, 15744800360, 295706164414, 29418861515276, 546918612768188, 54302516885868700, 1012217881734520402, 100529076003975579204, 1872900054912118231160, 185992129163581425898076 (list; graph; refs; listen; history; text; internal format)
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

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Last modified October 31 00:25 EDT 2020. Contains 338095 sequences. (Running on oeis4.)