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!)
A237939 Number of (n+1)X(2+1) 0..2 arrays with the maximum minus the minimum of every 2X2 subblock equal 1
437, 5519, 70435, 946063, 12909207, 178348911, 2478121687, 34547541807, 482441897847, 6743242294207, 94297236738151, 1318980922040111, 18451660550452439, 258144363280637727, 3611650688217168775 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A237945

LINKS

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

FORMULA

Empirical: a(n) = 20*a(n-1) -56*a(n-2) -524*a(n-3) +1719*a(n-4) +2496*a(n-5) -12490*a(n-6) +8016*a(n-7) +10172*a(n-8) -11936*a(n-9) +1560*a(n-10) +1344*a(n-11) -320*a(n-12)

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A216988 A190828 A084293 * A088893 A043447 A006911

Adjacent sequences:  A237936 A237937 A237938 * A237940 A237941 A237942

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 16 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 June 30 03:34 EDT 2022. Contains 354913 sequences. (Running on oeis4.)