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A252835 Number of nX7 nonnegative integer arrays with upper left 0 and every value within 2 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
22, 125, 850, 6211, 42738, 244131, 1056756, 3320837, 7822881, 14827629, 24422839, 36628371, 51446975, 68878827, 88923927, 111582275, 136853871, 164738715, 195236807, 228348147, 264072735, 302410571, 343361655, 386925987, 433103567 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A252836

LINKS

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

FORMULA

Empirical: a(n) = 1306624*n^2 - 17846996*n + 62638467 for n>11

EXAMPLE

Some solutions for n=4

..0..1..2..2..3..4..4....0..1..2..2..3..4..5....0..1..1..2..3..3..4

..0..1..2..3..3..4..5....0..1..2..2..3..4..5....0..1..1..2..3..4..4

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

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

CROSSREFS

Sequence in context: A039439 A209736 A209729 * A220622 A229375 A206418

Adjacent sequences:  A252832 A252833 A252834 * A252836 A252837 A252838

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 22 2014

STATUS

approved

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Last modified March 5 11:57 EST 2021. Contains 341823 sequences. (Running on oeis4.)