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A202793 Number of nX6 binary arrays with every one adjacent to another one horizontally, diagonally, antidiagonally or vertically 1
21, 2820, 182430, 10892633, 669872090, 41382940317, 2552520578945, 157398925950921, 9706685199080140, 598614098605286252, 36916537177815949777, 2276641091540314028026, 140400382336831018887599 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A202795

LINKS

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

FORMULA

Empirical: a(n) = 59*a(n-1) -96*a(n-2) +15198*a(n-3) +44555*a(n-4) +546802*a(n-5) +2654703*a(n-6) -11605935*a(n-7) -50148646*a(n-8) -109619761*a(n-9) -489848269*a(n-10) +2807188309*a(n-11) +13538187787*a(n-12) -14006226585*a(n-13) -84978170899*a(n-14) +5293728878*a(n-15) +168471311892*a(n-16) +81639123840*a(n-17) +53515556371*a(n-18) -81576024670*a(n-19) -376950186859*a(n-20) -165736793100*a(n-21) -12429982950*a(n-22) +165840234156*a(n-23) +312039809784*a(n-24) +124310784240*a(n-25) +34336444320*a(n-26) -46415278368*a(n-27) -79007876928*a(n-28) -33286629888*a(n-29) -11428107264*a(n-30)

EXAMPLE

Some solutions for n=2

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

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

CROSSREFS

Sequence in context: A184367 A114934 A098375 * A095154 A220999 A231825

Adjacent sequences: A202790 A202791 A202792 * A202794 A202795 A202796

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 24 2011

STATUS

approved

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Last modified January 28 14:40 EST 2023. Contains 359895 sequences. (Running on oeis4.)