login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A206192 Number of (n+1)X4 0..3 arrays with the number of clockwise edge increases in every 2X2 subblock equal to two 1
8304, 329216, 13173864, 527945420, 21162670972, 848327900384, 34006136221640, 1363171550451384, 54644142459882172, 2190466837748368020, 87807121912310588320, 3519839010271451725584, 141096375518760876476256 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A206197

LINKS

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

FORMULA

Empirical: a(n) = 69*a(n-1) -1503*a(n-2) +16061*a(n-3) -100719*a(n-4) +413071*a(n-5) -1200419*a(n-6) +2350991*a(n-7) -2650016*a(n-8) +246039*a(n-9) +5103223*a(n-10) -8853227*a(n-11) +5015318*a(n-12) +4249674*a(n-13) -9106668*a(n-14) +7509128*a(n-15) -3026335*a(n-16) +952523*a(n-17) -1880226*a(n-18) -37992*a(n-19) -166501*a(n-20) -450312*a(n-21) -419109*a(n-22) +222765*a(n-23) +217432*a(n-24) -15270*a(n-25) +13404*a(n-26) +5852*a(n-27) +348*a(n-28) for n>29

EXAMPLE

Some solutions for n=4

..2..3..3..0....1..1..2..0....1..0..2..1....2..1..1..2....1..3..3..3

..1..2..0..2....3..2..0..3....0..1..0..2....0..3..2..0....3..2..1..0

..3..1..1..3....0..3..1..0....2..2..1..3....3..0..3..2....0..3..2..1

..0..3..2..0....1..0..2..1....0..3..2..0....1..3..2..3....2..0..3..2

..3..0..3..1....3..2..3..2....1..0..3..1....2..0..3..2....2..1..0..3

CROSSREFS

Sequence in context: A329342 A237948 A250991 * A252155 A258676 A170778

Adjacent sequences: A206189 A206190 A206191 * A206193 A206194 A206195

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 04 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 December 9 00:20 EST 2022. Contains 358698 sequences. (Running on oeis4.)