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!)
A204482 Number of (n+2)X9 0..3 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically or nw-to-se diagonally exactly three ways, and new values 0..3 introduced in row major order 1
70726, 111707, 34964, 33788, 35990, 47369, 66580, 159783, 520508, 1817618, 6795292, 25689877, 97112294, 368075253, 1395441180, 5289843312, 20055181002, 76035026065, 288268814608, 1092909806027, 4143536006620, 15709332277494 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 7 of A204483
LINKS
FORMULA
Empirical: a(n) = 4*a(n-1) +a(n-2) -2*a(n-3) -19*a(n-4) -4*a(n-5) +21*a(n-6) +24*a(n-7) +3*a(n-8) -18*a(n-9) -9*a(n-10) for n>13
EXAMPLE
Some solutions for n=3
..0..1..1..0..0..1..1..2..3....0..1..0..0..2..0..0..2..3
..0..1..1..0..0..1..1..2..3....0..1..0..0..2..0..0..2..3
..0..1..1..0..0..1..1..2..3....0..1..0..0..2..0..0..2..3
..0..1..1..0..0..1..1..2..3....0..1..0..0..2..0..0..2..3
..1..1..1..0..0..1..1..2..3....0..1..0..0..2..0..0..2..3
CROSSREFS
Sequence in context: A253738 A252104 A236016 * A186821 A252728 A226530
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 15 2012
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 22 12:59 EST 2024. Contains 370255 sequences. (Running on oeis4.)