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A202652
Number of 3X3 0..n arrays with no row or column sum equal to the previous
2
126, 8460, 143028, 1217196, 6835050, 29025832, 100804408, 300779112, 797002582, 1919734900, 4275569868, 8918598788, 17597763122, 33103533936, 59741213696, 103962922160, 175195148094, 286904314092, 457948263108, 714267962604
OFFSET
1,1
COMMENTS
Row 3 of A202651
LINKS
FORMULA
Empirical: a(n) = 5*a(n-1) -6*a(n-2) -9*a(n-3) +24*a(n-4) -3*a(n-5) -26*a(n-6) +7*a(n-7) +18*a(n-8) +7*a(n-9) -26*a(n-10) -3*a(n-11) +24*a(n-12) -9*a(n-13) -6*a(n-14) +5*a(n-15) -a(n-16)
EXAMPLE
Some solutions for n=3
..0..0..3....3..0..0....0..3..0....3..0..3....2..3..0....0..0..2....0..3..2
..2..3..2....2..3..2....0..2..2....0..2..2....3..1..0....2..3..3....0..0..0
..0..1..2....3..3..0....2..3..0....2..1..3....0..0..1....0..2..3....0..3..0
CROSSREFS
Sequence in context: A208618 A352334 A267835 * A278624 A156931 A075919
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 22 2011
STATUS
approved