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A209606
Number of nX4 1..2 arrays with every element value z a city block distance of exactly z from another element value z
1
2, 45, 955, 11879, 151736, 1947347, 24912066, 322047969, 4162324219, 53725706448, 693454797025, 8950269164167, 115522311347383, 1491104128677150, 19246371866665817, 248421180186787884, 3206476873520078239
OFFSET
1,1
COMMENTS
Column 4 of A209610
LINKS
EXAMPLE
Some solutions for n=4
..1..1..1..2....1..1..1..2....2..2..2..2....1..1..2..2....2..2..2..1
..2..2..2..2....1..1..2..1....2..2..2..1....1..2..2..2....2..2..1..1
..2..2..2..1....1..1..2..1....2..1..2..1....1..2..2..1....1..2..2..2
..2..1..1..1....1..2..2..2....1..1..2..1....1..2..2..1....1..2..2..2
CROSSREFS
Sequence in context: A222997 A092654 A374863 * A100101 A332244 A090601
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 10 2012
STATUS
approved