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!)
A222140 Number of n X 4 0..4 arrays with no entry increasing mod 5 by 4 rightwards or downwards, starting with upper left zero. 2
64, 8788, 1206964, 165770032, 22767656980, 3127020364012, 429480137694664, 58986884432558548, 8101544704688334244, 1112705429924911477552, 152824358676750267429220, 20989638386627725143014812 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 4 of A222144.
LINKS
FORMULA
Empirical: a(n) = 153*a(n-1) - 2197*a(n-2) + 6434*a(n-3).
Empirical g.f.: 4*x*(16 - 251*x + 752*x^2) / (1 - 153*x + 2197*x^2 - 6434*x^3). - Colin Barker, Mar 14 2018
EXAMPLE
Some solutions for n=3:
..0..0..1..2....0..0..1..2....0..1..1..2....0..0..1..4....0..1..1..2
..0..3..4..2....0..3..4..2....1..4..1..3....1..1..4..0....0..3..4..0
..0..1..1..2....2..3..0..3....3..0..1..1....1..2..4..1....2..0..2..0
CROSSREFS
Cf. A222144.
Sequence in context: A187702 A184764 A239647 * A093264 A264146 A220731
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 09 2013
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 March 28 07:30 EDT 2024. Contains 371235 sequences. (Running on oeis4.)