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!)
A220923 Majority value maps: number of 2Xn binary arrays indicating the locations of corresponding elements equal to at least half of their horizontal, diagonal and antidiagonal neighbors in a random 0..2 2Xn array 1
1, 10, 44, 163, 626, 2351, 8950, 33895, 128696, 488096, 1852077, 7026179, 26657630, 101135949, 383705313, 1455749117, 5523022944, 20953977348, 79498036036, 301610318916, 1144289865773, 4341360811888, 16470839047751, 62489285631772 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 2 of A220922

LINKS

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

FORMULA

Empirical: a(n) = 4*a(n-1) +3*a(n-2) -16*a(n-3) +3*a(n-4) +17*a(n-5) -16*a(n-6) -8*a(n-7) +12*a(n-8) -12*a(n-9) +8*a(n-10) -8*a(n-12) +16*a(n-13) -16*a(n-14) -32*a(n-15)

EXAMPLE

Some solutions for n=3

..1..0..1....0..1..1....1..1..1....0..0..1....1..1..0....1..1..1....1..1..0

..0..0..0....1..0..0....1..0..1....1..1..1....1..0..1....0..0..0....1..0..0

CROSSREFS

Sequence in context: A060326 A200448 A124852 * A220994 A097416 A076373

Adjacent sequences:  A220920 A220921 A220922 * A220924 A220925 A220926

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 25 2012

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 25 17:46 EDT 2022. Contains 354851 sequences. (Running on oeis4.)