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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

R. H. Hardin, Table of n, a(n) for n = 1..17

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

Adjacent sequences:  A222512 A222513 A222514 * A222516 A222517 A222518

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 23 2013

STATUS

approved

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Last modified August 12 05:33 EDT 2020. Contains 336438 sequences. (Running on oeis4.)