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!)
A208372 Number of 6Xn 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 1 and 0 1 0 vertically 1
21, 441, 3633, 41433, 422541, 4503765, 47178453, 497691495, 5235328875, 55135304931, 580377874461, 6110484281013, 64328902346583, 677252632373457, 7129999455655041, 75063819603876579, 790261545306328809 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 6 of A208369

LINKS

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

FORMULA

Empirical: a(n) = 86*a(n-2) +334*a(n-3) -459*a(n-4) -3348*a(n-5) +249*a(n-6) +13148*a(n-7) +1379*a(n-8) -25508*a(n-9) +377*a(n-10) +23840*a(n-11) -4337*a(n-12) -8632*a(n-13) +1927*a(n-14) +1170*a(n-15) -195*a(n-16) -50*a(n-17)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

CROSSREFS

Sequence in context: A207440 A188691 A207430 * A206874 A188504 A206880

Adjacent sequences:  A208369 A208370 A208371 * A208373 A208374 A208375

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 25 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 July 6 11:13 EDT 2022. Contains 355110 sequences. (Running on oeis4.)