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A253703 Number of (6+1)X(n+1) 0..1 arrays with every 2X2 subblock ne-sw antidiagonal difference unequal to its neighbors horizontally and nw+se diagonal sum unequal to its neighbors vertically 1
1736, 1182, 1472, 1638, 2386, 3042, 4010, 5178, 6934, 8938, 12212, 16174, 22824, 30696, 43046, 57850, 79936, 107610, 148468, 201388, 277230, 375774, 516762, 699910, 965566, 1310400, 1809600, 2452546, 3377162, 4578316, 6298534, 8563704 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 6 of A253698

LINKS

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

FORMULA

Empirical: a(n) = 2*a(n-2) +a(n-5) -a(n-6) +2*a(n-7) +a(n-8) -8*a(n-9) -a(n-10) +2*a(n-11) +5*a(n-13) -11*a(n-15) +6*a(n-17) +7*a(n-19) -4*a(n-21) for n>31

EXAMPLE

Some solutions for n=4

..1..0..1..1..0....0..1..1..0..0....1..1..0..0..1....1..1..0..1..0

..1..1..0..0..0....1..0..0..1..1....0..0..1..0..0....0..1..0..0..1

..0..0..1..0..0....0..1..0..1..1....1..0..0..1..1....0..0..1..1..0

..1..0..0..1..1....0..1..1..0..0....0..1..1..0..1....1..1..0..1..0

..0..1..1..0..1....1..0..0..1..0....1..0..1..0..1....1..1..0..0..1

..1..0..1..1..1....0..1..0..1..0....1..0..1..1..0....0..0..1..1..0

..0..0..1..0..1....0..1..0..0..1....1..1..0..0..1....0..0..1..1..0

CROSSREFS

Sequence in context: A280927 A095847 A253696 * A235014 A185766 A179160

Adjacent sequences:  A253700 A253701 A253702 * A253704 A253705 A253706

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 09 2015

STATUS

approved

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Last modified May 22 09:50 EDT 2022. Contains 353949 sequences. (Running on oeis4.)