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!)
A208011 Number of nX6 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 0 1 1 vertically 1
19, 361, 1482, 6084, 16224, 43264, 92560, 198025, 369795, 690561, 1175034, 1999396, 3178672, 5053504, 7627464, 11512449, 16676595, 24157225, 33844690, 47416996, 64618224, 88059456, 117234312, 156075049, 203673379, 265787809, 340895730 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A208013

LINKS

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

FORMULA

Empirical: a(n) = 2*a(n-1) +6*a(n-2) -14*a(n-3) -14*a(n-4) +42*a(n-5) +14*a(n-6) -70*a(n-7) +70*a(n-9) -14*a(n-10) -42*a(n-11) +14*a(n-12) +14*a(n-13) -6*a(n-14) -2*a(n-15) +a(n-16)

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A207760 A262762 A207167 * A207788 A207303 A207916

Adjacent sequences:  A208008 A208009 A208010 * A208012 A208013 A208014

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 22 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 May 19 18:35 EDT 2022. Contains 353847 sequences. (Running on oeis4.)