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!)
A261552 Number of (n+2)X(5+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000101 or 00001011. 1
652, 871, 1210, 816, 656, 1273, 1084, 855, 1036, 1259, 906, 967, 1868, 1421, 1174, 1872, 2062, 1490, 1414, 2701, 2106, 1737, 2594, 2660, 1956, 1979, 3720, 2663, 2258, 3851, 3776, 2770, 2630, 4948, 3568, 3023, 4994, 4687, 3466, 3399, 6362, 4345, 3746 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 5 of A261553.
LINKS
FORMULA
Empirical: a(n) = 2*a(n-7) -2*a(n-21) +a(n-28) for n>34
EXAMPLE
Some solutions for n=4
..0..0..0..0..0..0..0....0..0..0..0..0..1..1....0..0..0..0..0..1..0
..1..0..0..0..0..1..0....0..1..0..0..1..0..0....1..1..0..0..1..0..0
..0..1..0..0..1..0..0....1..0..0..0..0..0..0....0..0..0..0..0..0..0
..0..0..0..0..0..0..0....0..0..0..0..0..0..0....1..0..0..0..0..0..0
..0..0..0..0..0..0..0....1..0..0..1..0..0..1....0..1..0..0..1..0..0
..1..0..1..0..0..1..0....1..0..1..0..0..0..0....0..0..0..0..0..1..0
CROSSREFS
Cf. A261553.
Sequence in context: A257715 A048915 A257827 * A002232 A127029 A127030
KEYWORD
nonn
AUTHOR
R. H. Hardin, Aug 24 2015
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 April 16 19:21 EDT 2024. Contains 371754 sequences. (Running on oeis4.)