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 A208173 Number of nX6 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than one of its immediate leftward or upward neighbors 1
 187, 506493, 1496307201, 4422202024212, 13069424064243420, 38625516979536823947, 114154269785454920027391, 337372761040287875038964700, 997075099388051313174129747636 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 6 of A208175 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 EXAMPLE Some solutions for n=4 ..0..0..1..0..0..0....0..1..0..0..1..0....0..0..0..1..0..2....0..0..0..0..1..1 ..0..1..2..1..1..3....1..0..2..3..1..3....2..0..1..3..2..0....2..0..2..2..1..0 ..3..3..2..0..0..2....2..2..1..1..3..2....0..1..0..1..0..1....3..2..3..0..2..3 ..1..1..3..1..0..0....0..1..0..3..0..1....3..3..3..2..3..0....3..0..1..2..3..2 CROSSREFS Sequence in context: A208862 A208870 A208877 * A200799 A241118 A208199 Adjacent sequences:  A208170 A208171 A208172 * A208174 A208175 A208176 KEYWORD nonn AUTHOR R. H. Hardin Feb 24 2012 STATUS approved

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Last modified January 24 04:35 EST 2020. Contains 331183 sequences. (Running on oeis4.)