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!)
A204538 T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically or nw-to-se diagonally exactly two ways, and new values 0..3 introduced in row major order 5
660, 9043, 9043, 132993, 212290, 132993, 1303179, 5430396, 5430396, 1303179, 16041873, 87110239, 271257261, 87110239, 16041873, 207574351, 1851793487, 6010070946, 6010070946, 1851793487, 207574351, 2345643287, 42694542185 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

.........660.........9043.........132993.......1303179......16041873

........9043.......212290........5430396......87110239....1851793487

......132993......5430396......271257261....6010070946..223736066952

.....1303179.....87110239.....6010070946..175609133220.9923132759682

....16041873...1851793487...223736066952.9923132759682

...207574351..42694542185.10108774450967

..2345643287.825548834273

.28467730050

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..40

EXAMPLE

Some solutions for n=3 k=3

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

..3..0..3..3..3....0..0..0..0..0....0..0..2..3..0....1..1..0..0..2

..2..0..0..0..0....1..1..2..1..1....1..0..0..0..0....1..2..0..3..0

..0..0..0..3..2....2..2..2..2..2....1..0..0..1..0....0..0..0..0..0

..2..2..2..2..2....3..2..2..3..3....1..2..0..2..2....0..2..0..3..2

CROSSREFS

Sequence in context: A206642 A064261 A235770 * A204534 A235553 A342994

Adjacent sequences:  A204535 A204536 A204537 * A204539 A204540 A204541

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Jan 16 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 November 30 19:02 EST 2021. Contains 349424 sequences. (Running on oeis4.)