A262330 Number of (n+1) X (6+1) 0..1 arrays with each row and column divisible by 3, read as a binary number with top and left being the most significant bits.

43, 261, 10935, 252097, 10789339, 394241389, 16940254423, 699094613961, 30056993215803, 1279198648576981, 55003871225837815, 2359070696262035857, 101439297012081117979, 4359072407628680510589, 187439773845177573589143

Offset: 1

Author

R. H. Hardin, Sep 18 2015

Keywords

• nonn

Comments

Column 6 of A262332.

Examples

			Some solutions for n=3
..1..1..0..1..1..0..0....0..0..0..0..0..0..0....0..0..1..1..1..1..0
..1..1..1..0..1..0..1....0..0..0..0..1..1..0....0..1..0..1..0..1..0
..0..0..1..0..1..0..1....0..0..0..0..1..1..0....1..1..0..0..0..1..1
..0..0..0..1..1..0..0....0..0..0..0..0..0..0....1..0..1..0..1..1..1
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210

Crossrefs

Cf. A262332.

Formula

Empirical: a(n) = 43*a(n-1) +793*a(n-2) -34099*a(n-3) -191667*a(n-4) +8241681*a(n-5) [phone]*a(n-6) -860684861*a(n-7) -980560940*a(n-8) [phone]*a(n-9) [phone]*a(n-10) -959301905520*a(n-11) -209959392832*a(n-12) [phone]*a(n-13) [phone]*a(n-14) -23250653977600*a(n-15).