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A253003 Number of nX7 nonnegative integer arrays with upper left 0 and lower right its king-move distance away minus 3 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
20, 140, 1028, 7235, 39758, 122833, 122833, 4915726, 59154789, 329035981, 1124010769, 2853903059, 5973571711, 10950733467, 18255251895, 28357151187, 41726455535, 58833189131, 80147376167, 106139040835, 137278207327 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A253004

LINKS

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

FORMULA

Empirical: a(n) = (235012096/3)*n^3 - 2126491008*n^2 + (58625640404/3)*n - 60801081325 for n>12

EXAMPLE

Some solutions for n=6

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

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

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

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

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

..2..2..2..3..3..3..3....2..2..2..2..3..3..3....2..2..3..3..3..3..3

CROSSREFS

Sequence in context: A134382 A105939 A054389 * A293932 A071816 A263960

Adjacent sequences:  A253000 A253001 A253002 * A253004 A253005 A253006

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 25 2014

STATUS

approved

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Last modified October 14 14:06 EDT 2019. Contains 328017 sequences. (Running on oeis4.)