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A253017 Number of (n+2)X(n+2) 0..3 arrays with every consecutive three elements in every row and column not having exactly two distinct values, and in every diagonal and antidiagonal having exactly two distinct values, and new values 0 upwards introduced in row major order 0
25, 50, 133, 155, 327, 864, 920, 1832, 4672, 4880, 9424, 23552, 24320, 46080, 113664, 116480, 217856, 532480, 542720, 1005568, 2441216, 2478080, 4558848, 11010048, 11141120, 20381696, 49020928, 49479680 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Diagonal of A253025
LINKS
EXAMPLE
Some solutions for n=4
..0..1..2..0..3..2....0..1..2..0..1..3....0..0..0..0..0..0....0..0..0..0..0..0
..2..2..2..2..2..2....1..1..1..1..1..1....0..1..2..0..1..2....1..2..0..3..2..0
..1..0..2..1..0..2....2..1..0..3..1..0....0..2..1..0..2..1....2..1..0..2..3..0
..0..1..2..0..1..2....0..1..3..0..1..3....0..0..0..0..0..0....0..0..0..0..0..0
..2..2..2..2..2..2....1..1..1..1..1..1....0..1..2..0..1..2....3..2..0..1..2..0
..3..0..2..1..3..2....3..1..0..3..1..0....0..2..1..0..2..1....2..1..0..2..1..0
CROSSREFS
Sequence in context: A232438 A360017 A034025 * A042236 A042238 A042234
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 26 2014
STATUS
approved

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Last modified July 15 19:27 EDT 2024. Contains 374334 sequences. (Running on oeis4.)