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A222489 Number of 2Xn 0..2 arrays with exactly floor(2Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..2 order 1
0, 0, 4, 5, 14, 100, 152, 998, 2168, 10768, 25816, 125264, 303568, 1457312, 3658176, 16964356, 44394392, 199079568, 539372480, 2352788576, 6567620800, 27950582336, 80148609344, 333551963152, 979715239584, 3996802471680, 11991536245888 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Row 2 of A222488

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..65

EXAMPLE

All solutions for n=4

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

..0..0..1..1....0..1..1..1....0..0..0..1....0..0..0..2....2..1..1..1

CROSSREFS

Sequence in context: A041034 A281911 A042535 * A222501 A225204 A308095

Adjacent sequences:  A222486 A222487 A222488 * A222490 A222491 A222492

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 22 2013

STATUS

approved

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Last modified January 24 04:47 EST 2022. Contains 350534 sequences. (Running on oeis4.)