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A252981 Number of nX6 nonnegative integer arrays with upper left 0 and lower right its king-move distance away minus 2 and every value increasing by 0 or 1 with every step right, diagonally se or down 2
10, 85, 851, 8487, 67537, 432842, 5672484, 36112108, 129234988, 322183180, 635379492, 1074743076, 1640984356, 2334103332, 3154100004, 4100974372, 5174726436, 6375356196, 7702863652, 9157248804, 10738511652, 12446652196 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A252983

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

FORMULA

Empirical: a(n) = 63438848*n^2 - 1019729920*n + 4176308004 for n>10

EXAMPLE

Some solutions for n=4

..0..1..1..1..1..2....0..1..1..1..2..2....0..1..2..2..2..2....0..0..1..1..1..1

..0..1..1..1..2..2....0..1..1..2..2..2....1..1..2..2..2..3....1..1..1..2..2..2

..0..1..1..1..2..3....1..1..1..2..2..2....1..1..2..2..2..3....1..2..2..2..2..3

..1..1..2..2..2..3....1..1..1..2..2..3....1..2..2..2..2..3....2..2..2..3..3..3

CROSSREFS

Sequence in context: A347003 A346923 A145146 * A184122 A228123 A163412

Adjacent sequences:  A252978 A252979 A252980 * A252982 A252983 A252984

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 25 2014

STATUS

approved

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Last modified August 16 21:38 EDT 2022. Contains 356169 sequences. (Running on oeis4.)