login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 56th year, we are closing in on 350,000 sequences, and we’ve crossed 9,700 citations (which often say “discovered thanks to the OEIS”).

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A204942 Number of (n+2)X4 0..2 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically or nw-to-se diagonally exactly one way, and new values 0..2 introduced in row major order 1
16032, 328910, 6907192, 135480703, 2795434368, 58695095028, 1207470043135, 25041308069922, 522156611063241, 10836026931458739, 225099736606852873, 4683065466351804274, 97330031208382877298, 2022937940387433629191 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A204945

LINKS

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

EXAMPLE

Some solutions for n=3

..0..0..0..1....0..0..0..0....0..0..1..0....0..0..1..1....0..1..0..2

..0..2..2..2....0..0..1..2....1..1..2..2....1..1..0..0....1..2..2..1

..1..1..2..1....1..2..1..2....2..2..2..2....1..1..1..0....1..1..1..1

..0..0..0..1....1..0..1..1....1..2..1..1....2..0..2..0....0..2..0..0

..0..0..1..1....1..2..2..2....1..0..1..1....0..1..0..0....2..0..0..1

CROSSREFS

Sequence in context: A151811 A151877 A187854 * A163112 A202420 A031839

Adjacent sequences:  A204939 A204940 A204941 * A204943 A204944 A204945

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 20 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified December 1 13:00 EST 2021. Contains 349429 sequences. (Running on oeis4.)