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A204053 Number of (n+2)X7 0..3 arrays with every 3X3 subblock having equal diagonal elements or equal antidiagonal elements, and new values 0..3 introduced in row major order 1
4823759, 45689226, 315429190, 2336174650, 18962117027, 135508809479, 1017086083917, 7592417722506, 56889349938986, 423304805355442, 3129226285383207, 23392351131337319, 174669286581663845 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A204056

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..29

EXAMPLE

Some solutions for n=3

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

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

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

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

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

CROSSREFS

Sequence in context: A017635 A203655 A248587 * A017538 A190583 A034637

Adjacent sequences:  A204050 A204051 A204052 * A204054 A204055 A204056

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 09 2012

STATUS

approved

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Last modified September 22 21:01 EDT 2020. Contains 337291 sequences. (Running on oeis4.)