login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A229577 Number of defective 4-colorings of an nX7 0..3 array connected horizontally, vertically, diagonally and antidiagonally with exactly one mistake, and colors introduced in row-major 0..3 order 1
246, 1312, 1584, 2064, 2852, 4048, 6108, 9992, 17716, 33504, 66188, 134200, 275940, 571280, 1186108, 2464488, 5119124, 10624576, 22028268, 45621656, 94380868, 195044592, 402663068, 830482504, 1711286772, 3523226528, 7247768908 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A229578

LINKS

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

FORMULA

Empirical: a(n) = 6*a(n-1) -13*a(n-2) +12*a(n-3) -4*a(n-4) for n>7

EXAMPLE

Some solutions for n=3

..0..1..2..1..2..1..0....0..1..0..2..3..1..0....0..1..2..1..2..1..2

..3..3..0..3..0..3..2....3..2..3..1..0..2..3....0..3..0..3..0..3..0

..2..1..2..1..2..1..0....0..1..0..2..3..2..0....2..1..2..1..2..1..2

CROSSREFS

Sequence in context: A231964 A231965 A067916 * A186796 A186788 A074995

Adjacent sequences:  A229574 A229575 A229576 * A229578 A229579 A229580

KEYWORD

nonn

AUTHOR

R. H. Hardin Sep 26 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 | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified October 22 11:21 EDT 2017. Contains 293761 sequences.