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!)
A297069 Number of nX4 0..1 arrays with no 1 adjacent to 1 king-move neighboring 1. 1
8, 103, 1292, 16059, 214205, 2883705, 38753117, 521094462, 7010388932, 94315578610, 1268880776347, 17071093252066, 229669459832452, 3089905546013391, 41570682341645865, 559279797267154090 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A297073.

LINKS

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

FORMULA

Empirical: a(n) = 15*a(n-1) -19*a(n-2) +9*a(n-3) -314*a(n-4) -2060*a(n-5) +2472*a(n-6) +13839*a(n-7) +10226*a(n-8) -11979*a(n-9) -23610*a(n-10) -6595*a(n-11) +10275*a(n-12) +14004*a(n-13) +13286*a(n-14) +2169*a(n-15) -5262*a(n-16) -4234*a(n-17) -6020*a(n-18) -2763*a(n-19) +1073*a(n-20) +538*a(n-21) +112*a(n-22) +96*a(n-23)

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A297073.

Sequence in context: A328061 A305603 A333985 * A090237 A222664 A190786

Adjacent sequences:  A297066 A297067 A297068 * A297070 A297071 A297072

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 24 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified January 28 13:34 EST 2022. Contains 350656 sequences. (Running on oeis4.)