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A222510 Number of 2Xn 0..1 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..1 order 1
0, 0, 4, 3, 10, 32, 44, 176, 326, 888, 2076, 5275, 12306, 32324, 74284, 195959, 460498, 1189652, 2861016, 7307596, 17774488, 45231012, 110756056, 281073368, 692630902, 1752734824, 4342317676, 10967047059, 27278066490, 68820679380, 171685581996 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Row 2 of A222509

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..123

EXAMPLE

All solutions for n=3

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

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

CROSSREFS

Sequence in context: A205965 A242391 A241862 * A100492 A072183 A346614

Adjacent sequences:  A222507 A222508 A222509 * A222511 A222512 A222513

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 23 2013

STATUS

approved

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Last modified October 25 23:22 EDT 2021. Contains 348256 sequences. (Running on oeis4.)