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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A237864 Number of (n+1)X(4+1) 0..2 arrays with the upper median plus the lower median minus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one 1
6030, 68830, 811498, 9902380, 115821338, 1360467556, 16245005586, 195628632968, 2309260676524, 27312310344552, 325894030112650, 3898536856894944, 46199441511935170, 548067141567809552, 6532107606070688156 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A237868

LINKS

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

EXAMPLE

Some solutions for n=2

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

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

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

CROSSREFS

Sequence in context: A239176 A236975 A206113 * A031821 A203352 A064248

Adjacent sequences:  A237861 A237862 A237863 * A237865 A237866 A237867

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 14 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 19 06:59 EDT 2019. Contains 322237 sequences. (Running on oeis4.)