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A223013 Number of 2Xn 0..1 arrays with no more than floor(2Xn/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..1 order 1
2, 4, 7, 18, 41, 119, 295, 825, 2060, 5873, 15234, 42492, 111787, 313666, 836575, 2327389, 6276477, 17477473, 47431027, 131755956, 359950638, 999799707, 2741682652, 7613006585, 20955577878, 58193926348, 160583108286, 446091089120 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 2 of A223012

LINKS

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

EXAMPLE

All solutions for n=3

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

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

CROSSREFS

Sequence in context: A259351 A300913 A232484 * A276027 A101569 A225435

Adjacent sequences:  A223010 A223011 A223012 * A223014 A223015 A223016

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 11 2013

STATUS

approved

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Last modified May 16 11:20 EDT 2021. Contains 343942 sequences. (Running on oeis4.)