login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A237408 Number of (n+1) X (4+1) 0..2 arrays with the maximum plus the upper median plus the minimum of every 2 X 2 subblock differing from its horizontal and vertical neighbors by exactly one. 1
5228, 44186, 373804, 3604930, 35476776, 330330878, 3029315052, 28551327846, 271444171644, 2547123932136, 23780590707200, 223518159353886, 2106911371257820, 19790959500035682, 185592593234314976 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A237412.

LINKS

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

EXAMPLE

Some solutions for n=2

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

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

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

CROSSREFS

Sequence in context: A031616 A067224 A204139 * A235296 A260176 A093182

Adjacent sequences:  A237405 A237406 A237407 * A237409 A237410 A237411

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 07 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 June 22 03:01 EDT 2021. Contains 345367 sequences. (Running on oeis4.)