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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A301792 Number of 3Xn 0..1 arrays with every element equal to 0 or 1 horizontally or antidiagonally adjacent elements, with upper left element zero. 1
4, 13, 12, 17, 25, 38, 59, 93, 148, 237, 381, 614, 991, 1601, 2588, 4185, 6769, 10950, 17715, 28661, 46372, 75029, 121397, 196422, 317815, 514233, 832044, 1346273, 2178313, 3524582, 5702891, 9227469, 14930356, 24157821, 39088173, 63245990 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 3 of A301790.

LINKS

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

FORMULA

Empirical: a(n) = 2*a(n-1) -a(n-3) for n>5

EXAMPLE

Some solutions for n=5

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

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

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

CROSSREFS

Cf. A301790.

Sequence in context: A136137 A287895 A050223 * A168401 A081738 A232496

Adjacent sequences:  A301789 A301790 A301791 * A301793 A301794 A301795

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 26 2018

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 21 22:12 EDT 2019. Contains 322328 sequences. (Running on oeis4.)