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A204055 Number of (n+2)X9 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
290942303, 2777961511, 18455232523, 133138952807, 1017086083917, 7515064468455, 58142833651117, 412455945842695, 3064813457955803, 22227920370644935, 163207802839017919, 1189958959521461223 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A204056

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..18

EXAMPLE

Some solutions for n=3

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

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

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

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

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

CROSSREFS

Sequence in context: A214155 A183737 A234807 * A251566 A112452 A291459

Adjacent sequences:  A204052 A204053 A204054 * A204056 A204057 A204058

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 09 2012

STATUS

approved

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Last modified August 14 07:04 EDT 2020. Contains 336477 sequences. (Running on oeis4.)