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

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

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 A367440 A101569

Adjacent sequences: A223010 A223011 A223012 * A223014 A223015 A223016

Keyword

nonn

Author

R. H. Hardin Mar 11 2013

Status

approved