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A252548 Number of (5+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 1 3 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 1 3 4 6 or 7 1
13104, 213120, 2576592, 11206944, 187695936, 2316305760, 10519316352, 177838495488, 2214324086400, 10320806426112, 175062867028992, 2188646614639104, 10347503929104384, 175737142491033600 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Row 5 of A252544
LINKS
FORMULA
Empirical: a(n) = 1804*a(n-3) -939040*a(n-6) +145285120*a(n-9) -1639972864*a(n-12) +4294967296*a(n-15)
EXAMPLE
Some solutions for n=1
..1..3..0....3..0..1....0..1..3....0..1..3....3..3..1....3..3..1....3..0..1
..1..2..1....1..0..0....1..1..2....3..0..1....1..3..3....2..1..1....3..2..2
..3..0..1....1..2..1....1..0..0....2..1..1....1..2..1....0..1..0....2..3..2
..1..3..3....3..3..1....0..1..0....3..1..3....3..3..1....0..3..1....0..3..1
..1..2..1....1..0..3....1..1..2....0..3..1....1..0..0....2..1..1....0..2..2
..3..3..1....1..2..1....1..3..0....2..1..1....1..2..1....0..1..0....2..0..2
..1..3..0....0..0..1....0..1..0....0..1..3....3..3..1....3..0..1....0..0..1
CROSSREFS
Sequence in context: A184768 A345150 A345151 * A015341 A233689 A250904
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 18 2014
STATUS
approved

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Last modified March 28 10:53 EDT 2024. Contains 371240 sequences. (Running on oeis4.)