A263058 Number of (n+1)X(6+1) 0..1 arrays with each row and column not divisible by 3, read as a binary number with top and left being the most significant bits.

42, 22921, 1941702, 232738767, 19763462754, 1825928130193, 155157177242886, 13464303796343791, 1144373527121975682, 97776065732064546321, 8310794250378741921702, 707331447947977777389487

Offset: 1

Author

R. H. Hardin, Oct 08 2015

Keywords

• nonn

Comments

Column 6 of A263060.

Examples

			Some solutions for n=2
..1..0..0..1..1..0..0....1..0..0..0..0..1..1....0..0..1..1..1..0..1
..1..0..0..0..1..1..1....0..1..0..1..0..0..0....1..0..1..1..0..0..0
..1..1..1..1..1..0..0....0..0..1..0..1..0..0....0..1..1..1..0..1..1
		

Links

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

Crossrefs

Cf. A263060.

Formula

Empirical: a(n) = 85*a(n-1) +3026*a(n-2) -257210*a(n-3) -2725780*a(n-4) [phone]*a(n-5) [phone]*a(n-6) -88621345610*a(n-7) -184834243867*a(n-8) [phone]*a(n-9) [phone]*a(n-10) -1372627293957500*a(n-11) -690707626945552*a(n-12) +58710148290371920*a(n-13) +13366198928883008*a(n-14) -1136126908955055680*a(n-15) -92117546962355200*a(n-16) +7829991491800192000*a(n-17)