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

290942303, 2777961511, 18455232523, 133138952807, 1017086083917, 7515064468455, 58142833651117, 412455945842695, 3064813457955803, 22227920370644935, 163207802839017919, 1189958959521461223

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: A346361 A183737 A234807 * A344364 A344647 A344648

Adjacent sequences: A204052 A204053 A204054 * A204056 A204057 A204058

Keyword

nonn

Author

R. H. Hardin Jan 09 2012

Status

approved