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A223619 Number of nX7 0..1 arrays with rows and columns unimodal 1
29, 841, 14547, 160883, 1271969, 7795951, 39162020, 167679972, 629671260, 2118764468, 6495046664, 18377663488, 48503155274, 120433134332, 283334050243, 635338765283, 1364719186775, 2820129263963, 5627010952649, 10875524219289 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A223620

LINKS

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

FORMULA

Empirical: a(n) = (503/209563200)*n^14 + (6527/155675520)*n^13 + (17/31185)*n^12 + (37901/8553600)*n^11 + (76799/2721600)*n^10 + (46471/362880)*n^9 + (3497567/7620480)*n^8 + (936493/777600)*n^7 + (467419/181440)*n^6 + (320807/77760)*n^5 + (69073271/11975040)*n^4 + (29326111/4989600)*n^3 + (60167903/11642400)*n^2 + (191717/72072)*n + 1

EXAMPLE

Some solutions for n=4

..0..0..0..0..0..0..0....0..0..0..0..0..1..1....0..0..0..0..0..0..0

..0..0..0..1..1..1..0....0..0..1..1..1..1..1....0..0..1..1..1..1..1

..1..0..0..0..0..0..0....0..1..1..1..1..0..0....1..1..1..1..1..1..1

..0..1..0..0..0..0..0....0..1..1..1..1..0..0....0..0..1..1..1..1..0

CROSSREFS

Sequence in context: A223643 A223668 A223636 * A223679 A171303 A262337

Adjacent sequences:  A223616 A223617 A223618 * A223620 A223621 A223622

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 24 2013

STATUS

approved

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Last modified January 26 05:10 EST 2020. Contains 331273 sequences. (Running on oeis4.)