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 A210783 Number of nX3 1..4 arrays with no element with value z exactly a city block distance of z from another element with value z 1
 53, 1533, 21379, 142627, 748627, 3846906, 23759000, 197838865, 1811137986, 15107056679, 115124207482, 786166311691, 5501528161561, 40508050305846, 318512137465444, 2493337048435362, 19390930320063991, 143007988520740490 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 3 of A210788 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 EXAMPLE Some solutions for n=4 ..4..3..1....2..3..4....1..2..2....1..3..1....2..4..4....2..3..3....4..2..4 ..2..1..3....3..4..2....3..1..4....4..1..2....2..3..4....2..1..3....1..2..1 ..1..3..1....1..3..4....4..3..4....4..3..2....3..4..2....4..4..1....3..4..3 ..3..1..2....4..1..3....1..2..3....1..4..3....1..3..1....3..2..2....4..3..4 CROSSREFS Sequence in context: A017716 A180365 A282931 * A221237 A059694 A263516 Adjacent sequences: A210780 A210781 A210782 * A210784 A210785 A210786 KEYWORD nonn AUTHOR R. H. Hardin Mar 26 2012 STATUS approved

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Last modified June 10 04:13 EDT 2023. Contains 363187 sequences. (Running on oeis4.)