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A222770 Number of 2Xn 0..1 arrays with exactly floor(2Xn/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..1 order 1
0, 3, 4, 11, 18, 73, 152, 470, 1022, 3361, 7840, 23386, 57626, 172387, 434280, 1257025, 3275034, 9399647, 24776572, 70325187, 188540168, 531573662, 1436226680, 4032772569, 10987025446, 30742228871, 84180549328, 235159618106 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 2 of A222769

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..107

EXAMPLE

All solutions for n=3

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

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

CROSSREFS

Sequence in context: A030225 A060285 A025079 * A036652 A295962 A097072

Adjacent sequences:  A222767 A222768 A222769 * A222771 A222772 A222773

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 05 2013

STATUS

approved

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Last modified June 25 18:30 EDT 2019. Contains 324353 sequences. (Running on oeis4.)