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A222512 Number of 4Xn 0..1 arrays with exactly floor(4Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..1 order 1
0, 11, 35, 84, 423, 1753, 8489, 39873, 200999, 988455, 5011027, 24887392, 126164927, 633230135, 3213998827, 16234077336, 82517378821, 418670560481, 2132042077379, 10852726670501, 55367063804357, 282538940546931, 1443897042955709 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Row 4 of A222509
LINKS
EXAMPLE
Some solutions for n=3
..0..0..0....0..0..0....0..0..0....0..0..1....0..1..1....0..0..0....0..0..0
..0..0..1....0..0..0....0..1..0....0..0..0....1..1..1....0..0..0....0..0..0
..0..0..1....0..1..0....1..1..1....1..0..0....1..1..0....1..1..1....0..0..0
..0..0..0....1..1..1....1..1..1....0..0..0....1..1..1....1..1..1....1..1..0
CROSSREFS
Sequence in context: A092069 A103115 A003777 * A297539 A323691 A368743
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 23 2013
STATUS
approved

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Last modified April 21 04:54 EDT 2024. Contains 371850 sequences. (Running on oeis4.)