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!)
A282787 Number of nX4 0..1 arrays with no 1 equal to more than one of its king-move neighbors, with the exception of exactly one element. 1
2, 16, 318, 1952, 16584, 119176, 832218, 5780340, 39020884, 260919192, 1725189008, 11301829056, 73518360532, 475188725292, 3055000301306, 19549420762100, 124588203699132, 791140457595836, 5007656160113482, 31605725372441888 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A282791.

LINKS

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

FORMULA

Empirical: a(n) = 4*a(n-1) +28*a(n-2) +26*a(n-3) -404*a(n-4) -1508*a(n-5) -2631*a(n-6) -1242*a(n-7) +1650*a(n-8) +5880*a(n-9) +5486*a(n-10) +2762*a(n-11) -2635*a(n-12) -3886*a(n-13) -3543*a(n-14) -896*a(n-15) -39*a(n-16) +322*a(n-17) -49*a(n-18)

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A282791.

Sequence in context: A189058 A189189 A188867 * A137729 A278589 A171212

Adjacent sequences: A282784 A282785 A282786 * A282788 A282789 A282790

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 21 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 February 8 04:10 EST 2023. Contains 360134 sequences. (Running on oeis4.)