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A222515 Number of 7Xn 0..1 arrays with exactly floor(7Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..1 order 1
0, 144, 1335, 15420, 128889, 2220730, 19892241, 385142640, 3707833063, 76288704212, 767768563690, 16265595620923, 167593171246145, 3601551682848558, 37565287343451014, 813220525871238420 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Row 7 of A222509
LINKS
EXAMPLE
Some solutions for n=3
..0..0..0....0..0..0....0..0..0....0..0..0....0..0..1....0..0..0....0..0..0
..0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0
..0..0..1....0..0..0....0..0..0....1..0..0....0..0..0....0..0..0....0..0..0
..0..0..0....0..1..0....0..0..1....0..0..1....0..0..0....0..0..0....0..0..0
..0..0..1....0..1..1....1..0..0....1..0..0....1..0..1....0..1..0....0..0..1
..0..0..1....1..1..1....0..1..0....0..0..0....0..0..0....0..0..1....0..1..1
..1..0..0....0..1..1....1..1..1....0..0..1....1..0..0....0..0..1....0..0..1
CROSSREFS
Sequence in context: A203826 A261655 A203819 * A023096 A223435 A169859
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 23 2013
STATUS
approved

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Last modified February 25 19:44 EST 2024. Contains 370332 sequences. (Running on oeis4.)