login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A185463 Number of (n+1)X6 binary arrays with no 2X2 subblock determinant equal to any horizontal or vertical neighbor 2X2 subblock determinant 1
540, 1646, 8762, 49670, 265724, 1388736, 7232746, 37562322, 195052754, 1012776710, 5258562310, 27304187370, 141772888292, 736133966262, 3822262004304, 19846499585644, 103049855165970, 535070324603120 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A185467

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..200

FORMULA

Empirical: a(n)=3*a(n-1)+6*a(n-2)+20*a(n-3)+24*a(n-4)+64*a(n-5)+107*a(n-6)+125*a(n-7)+88*a(n-8)-76*a(n-9)+63*a(n-10)+42*a(n-11)+4*a(n-12)-10*a(n-13)-6*a(n-14)+2*a(n-15) for n>21

EXAMPLE

Some solutions for 3X6

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

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

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

CROSSREFS

Sequence in context: A253463 A255105 A298685 * A069474 A253824 A218414

Adjacent sequences:  A185460 A185461 A185462 * A185464 A185465 A185466

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 28 2011

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
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 15 17:45 EDT 2021. Contains 348033 sequences. (Running on oeis4.)