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 A223003 Number of 4Xn 0..2 arrays with no more than floor(4Xn/2) elements equal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..2 order 1
 14, 391, 13655, 486262, 18420655, 713884175, 28143883707, 1121835123141, 45093000204487, 1824408455268081, 74199480797734648, 3030607349703160325, 124221672704753507355, 5107012096035147244881, 210500491692841318950250 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Row 4 of A223000 LINKS R. H. Hardin, Table of n, a(n) for n = 1..18 EXAMPLE Some solutions for n=3 ..0..1..1....0..1..2....0..0..1....0..1..2....0..1..0....0..1..0....0..0..1 ..1..2..0....0..1..1....1..2..0....0..1..2....0..1..0....0..1..0....1..0..2 ..0..2..0....0..2..0....0..2..0....2..1..2....2..1..1....1..1..2....1..0..2 ..1..1..0....2..1..0....1..2..2....2..0..1....1..1..2....0..0..0....1..2..1 CROSSREFS Sequence in context: A233094 A211421 A097310 * A228185 A041367 A041364 Adjacent sequences:  A223000 A223001 A223002 * A223004 A223005 A223006 KEYWORD nonn AUTHOR R. H. Hardin Mar 11 2013 STATUS approved

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Last modified January 22 13:23 EST 2022. Contains 350481 sequences. (Running on oeis4.)