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!)
A241373 Number of 4Xn 0..2 arrays with no element equal to fewer vertical neighbors than horizontal neighbors, with new values 0..2 introduced in row major order 1
14, 326, 7376, 169982, 3910194, 90008909, 2071815945, 47690157718, 1097756412666, 25268747760871, 581649645222695, 13388725521741539, 308188912773527912, 7094058807175007496, 163294876256510271215 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 4 of A241370

LINKS

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

FORMULA

Empirical: a(n) = 32*a(n-1) -214*a(n-2) +26*a(n-3) +3879*a(n-4) -15470*a(n-5) +19107*a(n-6) +72463*a(n-7) -211026*a(n-8) +106996*a(n-9) +193844*a(n-10) -2000756*a(n-11) +412552*a(n-12) +8652096*a(n-13) -3035456*a(n-14) -10691648*a(n-15) +6530688*a(n-16) +2014720*a(n-17) -6114304*a(n-18) +2244608*a(n-19) +1933312*a(n-20) -720896*a(n-21) for n>23

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A275500 A275397 A275262 * A090598 A277769 A060075

Adjacent sequences:  A241370 A241371 A241372 * A241374 A241375 A241376

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 20 2014

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 4 04:45 EDT 2022. Contains 355064 sequences. (Running on oeis4.)