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!)
A303680 Number of nX6 0..1 arrays with every element unequal to 0, 1 or 3 king-move adjacent elements, with upper left element zero. 1
13, 49, 39, 64, 110, 177, 245, 335, 467, 657, 949, 1391, 2035, 2937, 4221, 6079, 8771, 12657, 18269, 26383, 38091, 54969, 79317, 114471, 165219, 238457, 344157, 496719, 716907, 1034681, 1493309, 2155247, 3110611, 4489449, 6479477, 9351631, 13496923 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A303682.

LINKS

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

FORMULA

Empirical: a(n) = a(n-1) +a(n-4) +a(n-7) for n>12

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A303682.

Sequence in context: A013200 A156694 A080171 * A304131 A304219 A305480

Adjacent sequences:  A303677 A303678 A303679 * A303681 A303682 A303683

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 28 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 September 24 09:10 EDT 2021. Contains 347630 sequences. (Running on oeis4.)