A210785 Number of nX5 1..4 arrays with no element with value z exactly a city block distance of z from another element with value z

497, 40038, 748627, 8039420, 98861559, 1663213556, 37591420090, 889827826226, 19000146172584, 357119485379094, 6660333940592922, 127334484690637704, 2571728358748562057, 51856792367440537602, 1045305735218927674440

Offset

1,1

Comments

Column 5 of A210788

Links

R. H. Hardin, Table of n, a(n) for n = 1..18

Example

Some solutions for n=4
..2..1..3..3..2....3..3..3..4..4....2..1..3..1..3....3..4..3..1..4
..1..4..3..1..2....1..3..4..1..4....4..3..4..2..1....4..1..4..3..1
..4..4..4..4..1....4..1..2..4..1....3..4..3..1..4....1..4..2..1..3
..1..2..2..1..3....1..4..1..3..2....1..3..1..3..1....2..3..1..3..1

Crossrefs

Sequence in context: A097785 A145922 A145981 * A064255 A067917 A093249

Adjacent sequences: A210782 A210783 A210784 * A210786 A210787 A210788

Keyword

nonn

Author

R. H. Hardin Mar 26 2012

Status

approved