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

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A283412 Number of nX5 0..1 arrays with no 1 equal to more than three of its horizontal, vertical and antidiagonal neighbors. 1
32, 912, 20744, 519252, 12806920, 315717408, 7790355688, 192182078748, 4741143038544, 116964083503632, 2885504333511816, 71185418665054296, 1756144835980151024, 43324107338347311024, 1068806077429802489752 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A283415.

LINKS

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

FORMULA

Empirical: a(n) = 13*a(n-1) +228*a(n-2) +1321*a(n-3) +3587*a(n-4) +6648*a(n-5) +4808*a(n-6) +23696*a(n-7) +47315*a(n-8) +419628*a(n-9) -870309*a(n-10) +1567905*a(n-11) -601094*a(n-12) -2760190*a(n-13) +11844999*a(n-14) -23437302*a(n-15) +31055256*a(n-16) -40298061*a(n-17) +41215657*a(n-18) -37139862*a(n-19) +39606164*a(n-20) -38463655*a(n-21) +27093646*a(n-22) -14888649*a(n-23) +11716400*a(n-24) -10771719*a(n-25) +5771122*a(n-26) -1073393*a(n-27) -535654*a(n-28) +423321*a(n-29) -155939*a(n-30) +68452*a(n-31) -31796*a(n-32) +11014*a(n-33) -2628*a(n-34) +576*a(n-35) -225*a(n-36) +81*a(n-37) for n>39

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Cf. A283415.

Sequence in context: A283854 A160314 A241223 * A227441 A067820 A263818

Adjacent sequences:  A283409 A283410 A283411 * A283413 A283414 A283415

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 07 2017

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 May 20 13:32 EDT 2022. Contains 353873 sequences. (Running on oeis4.)