login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A316805 Number of nX5 0..1 arrays with every element unequal to 0, 1, 2, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero. 1
16, 512, 14711, 420345, 12075849, 347046960, 9972851339, 286582122564, 8235306627639, 236652160847776, 6800504870966239, 195421272862924839, 5615682165687949161, 161373865411808416990, 4637286026726276662130 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A316808.

LINKS

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

FORMULA

Empirical: a(n) = 29*a(n-1) -20*a(n-2) +376*a(n-3) -465*a(n-4) -2367*a(n-5) +374*a(n-6) -6254*a(n-7) +28308*a(n-8) -10515*a(n-9) -124724*a(n-10) +128227*a(n-11) +52996*a(n-12) -74116*a(n-13) +242502*a(n-14) -97704*a(n-15) -118290*a(n-16) +76312*a(n-17) -62048*a(n-18) -18536*a(n-19) +38160*a(n-20) +2816*a(n-21) -4096*a(n-22)

EXAMPLE

Some solutions for n=5

..0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0

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

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

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

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

CROSSREFS

Cf. A316808.

Sequence in context: A302007 A301781 A264144 * A317522 A299651 A300205

Adjacent sequences: A316802 A316803 A316804 * A316806 A316807 A316808

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 14 2018

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified December 2 07:06 EST 2022. Contains 358493 sequences. (Running on oeis4.)