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!)
A231758 Number of (n+1)X(2+1) 0..1 arrays with no element having a strict majority of its horizontal, diagonal and antidiagonal neighbors equal to one 1
33, 136, 660, 3213, 14989, 70927, 338352, 1603633, 7596720, 36066272, 171140301, 811651995, 3850637109, 18269376384, 86668158745, 411153474416, 1950577525332, 9253691650061, 43899995716425, 208265361505983, 988028267125504 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A231764

LINKS

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

FORMULA

Empirical: a(n) = 3*a(n-1) +47*a(n-3) -25*a(n-4) +21*a(n-5) -403*a(n-6) +110*a(n-7) +40*a(n-8) +1601*a(n-9) -348*a(n-10) -520*a(n-11) -2656*a(n-12) +792*a(n-13) +288*a(n-14) +2480*a(n-15) -544*a(n-16) +128*a(n-17) -1600*a(n-18) +128*a(n-19) +512*a(n-21)

EXAMPLE

Some solutions for n=6

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

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

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

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

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

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

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

CROSSREFS

Sequence in context: A105091 A158588 A232538 * A215962 A084028 A283552

Adjacent sequences:  A231755 A231756 A231757 * A231759 A231760 A231761

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 13 2013

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 September 25 13:01 EDT 2020. Contains 337344 sequences. (Running on oeis4.)