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A252937 Number of nX7 nonnegative integer arrays with upper left 0 and every value within 3 of its king move distance from the upper left and every value increasing by 0 or 1 with every step right, diagonally se or down 1
42, 329, 3016, 30818, 320270, 2952734, 21312696, 113154831, 440052087, 1302939451, 3104860285, 6297578921, 11347942213, 18725672417, 28900783485, 42343299609, 59523244981, 80910643793, 106975520237, 138187898505 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A252938

LINKS

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

FORMULA

Empirical: a(n) = (235012096/3)*n^3 - 1891478912*n^2 + (46791365972/3)*n - 43861899175 for n>12

EXAMPLE

Some solutions for n=4

..0..1..1..2..3..3..3....0..1..2..2..3..3..4....0..1..1..2..2..3..3

..1..1..1..2..3..3..3....1..1..2..2..3..4..4....1..1..1..2..2..3..3

..1..2..2..2..3..3..3....1..1..2..2..3..4..4....1..1..2..2..3..3..3

..2..2..2..3..3..3..4....1..2..2..2..3..4..5....2..2..2..2..3..4..4

CROSSREFS

Sequence in context: A167654 A095266 A232338 * A033277 A190533 A190602

Adjacent sequences:  A252934 A252935 A252936 * A252938 A252939 A252940

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 24 2014

STATUS

approved

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Last modified March 29 05:19 EDT 2020. Contains 333105 sequences. (Running on oeis4.)