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

 

Logo

Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing.
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A298058 Number of nX3 0..1 arrays with every element equal to 1, 3, 4 or 6 king-move adjacent elements, with upper left element zero. 1
0, 3, 0, 2, 6, 13, 22, 68, 132, 323, 790, 1724, 4158, 10007, 22770, 54346, 129582, 301431, 715256, 1697866, 3987490, 9441255, 22363356, 52732570, 124755460, 295222595, 697290424, 1649165304, 3900971604, 9220090253, 21804026010 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 3 of A298063.

LINKS

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

FORMULA

Empirical: a(n) = a(n-1) +2*a(n-2) +12*a(n-3) -8*a(n-4) -20*a(n-5) -50*a(n-6) +12*a(n-7) +61*a(n-8) +87*a(n-9) +13*a(n-10) -74*a(n-11) -50*a(n-12) -8*a(n-13) +45*a(n-14) +8*a(n-15) +2*a(n-16) -12*a(n-17) for n>18

EXAMPLE

Some solutions for n=9

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

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

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

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

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

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

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

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

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

CROSSREFS

Cf. A298063.

Sequence in context: A135040 A048733 A309973 * A298707 A274417 A208764

Adjacent sequences:  A298055 A298056 A298057 * A298059 A298060 A298061

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 11 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 December 13 06:26 EST 2019. Contains 329968 sequences. (Running on oeis4.)