A223013 - OEIS

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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

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