login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A205623 Number of (n+1)X6 0..2 arrays with every 2X2 subblock in a row having an equal number of equal diagonal or equal antidiagonal elements, adjacent rows differing in this number, and new values 0..2 introduced in row major order 1
3074, 43248, 708300, 11438856, 188139156, 3042034560, 50032728864, 809272164864, 13306390815072, 215291512025088, 3538911397147392, 57273957730844160, 941198542228997376, 15236505936023298048 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A205626

LINKS

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

FORMULA

Empirical: a(n) = 264*a(n-2) +80*a(n-3) -648*a(n-4) -1536*a(n-5) -8384*a(n-6) -65536*a(n-8) for n>9

EXAMPLE

Some solutions for n=4

..0..1..2..0..2..2....0..0..0..0..0..1....0..0..0..0..0..1....0..0..0..0..1..0

..2..1..2..0..1..0....0..1..0..1..0..0....0..2..0..2..0..0....2..0..1..0..0..2

..0..2..2..2..0..2....2..1..0..1..2..1....1..2..0..2..1..1....1..0..2..2..1..2

..0..1..0..1..0..1....0..2..1..1..1..0....0..1..2..1..0..1....1..1..0..2..2..2

..1..0..1..0..1..0....1..2..0..2..2..2....0..1..0..1..2..1....2..2..0..1..0..1

CROSSREFS

Sequence in context: A137485 A251786 A262459 * A205358 A045083 A186470

Adjacent sequences:  A205620 A205621 A205622 * A205624 A205625 A205626

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 29 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified November 12 22:04 EST 2019. Contains 329079 sequences. (Running on oeis4.)