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!)
A206410 Number of (n+1) X 5 0..2 arrays with every 2 X 3 or 3 X 2 subblock having an equal number of clockwise and counterclockwise edge increases. 1

%I #7 Dec 13 2015 01:18:18

%S 15087,953865,62351943,4099250889,269845754715,17769571483479,

%T 1170258128101905,77072446958972853,5075985987460513995,

%U 334304949004000847991,22017374591980900445685,1450067958051192311462769

%N Number of (n+1) X 5 0..2 arrays with every 2 X 3 or 3 X 2 subblock having an equal number of clockwise and counterclockwise edge increases.

%C Column 4 of A206414.

%H R. H. Hardin, <a href="/A206410/b206410.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 121*a(n-1) -4842*a(n-2) +93442*a(n-3) -984794*a(n-4) +5503671*a(n-5) -9072726*a(n-6) -78684541*a(n-7) +535626405*a(n-8) -991587240*a(n-9) -2580309619*a(n-10) +15747001849*a(n-11) -20598090193*a(n-12) -41549984245*a(n-13) +164996602285*a(n-14) -124687904298*a(n-15) -276964848873*a(n-16) +640627801097*a(n-17) -268835295686*a(n-18) -615894146346*a(n-19) +919184816798*a(n-20) -316305834243*a(n-21) -338190799906*a(n-22) +415103347869*a(n-23) -166830909951*a(n-24) +1177218958*a(n-25) +23150659951*a(n-26) -7462678489*a(n-27) +119744345*a(n-28) +412765357*a(n-29) -80434289*a(n-30) -308634*a(n-31) +1758176*a(n-32) -205020*a(n-33) +8424*a(n-34) -108*a(n-35).

%e Some solutions for n=4:

%e ..0..2..1..2..1....1..0..1..1..1....1..0..1..2..0....1..2..2..1..2

%e ..1..0..2..0..2....1..1..0..0..0....2..1..0..1..2....1..1..1..2..1

%e ..1..1..0..2..0....1..2..1..0..2....1..0..0..0..1....2..2..2..2..1

%e ..1..2..1..0..1....1..1..2..1..0....1..0..0..2..0....1..1..1..1..0

%e ..1..1..2..1..1....0..0..1..2..1....0..0..2..0..0....0..0..1..1..1

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 07 2012

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 March 28 04:13 EDT 2024. Contains 371235 sequences. (Running on oeis4.)