A209098 Number of nX6 0..2 arrays with new values 0..2 introduced in row major order and no element equal to more than one of its immediate leftward or upward or right-upward antidiagonal neighbors.

122, 24256, 5171088, 1118366188, 242632290432, 52675800891748, 11437585318270860, 2483525516352937680, 539268195586029921832, 117095796409143583455428, 25425988916932630731090072

Offset: 1

Author

R. H. Hardin Mar 05 2012

Keywords

• nonn

Comments

Column 6 of A209100

Examples

			Some solutions for n=4
..0..0..0..0..1..0....0..0..1..2..0..2....0..0..0..1..1..2....0..0..1..2..2..2
..2..2..2..1..2..0....1..0..2..1..2..1....2..1..2..0..1..1....1..0..0..1..0..1
..1..0..1..0..1..2....2..0..1..2..0..2....2..1..1..0..2..2....0..1..0..1..2..2
..1..2..1..0..1..2....2..2..0..1..2..1....0..2..1..2..0..2....0..1..0..1..0..2
		

Links

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

Formula

Empirical: a(n) = 300*a(n-1) -20582*a(n-2) +603924*a(n-3) -9449609*a(n-4) [phone]*a(n-5) -653230134*a(n-6) [phone]*a(n-7) -24669590390*a(n-8) [phone]*a(n-9) -543298308924*a(n-10) [phone]*a(n-11) -3917246807088*a(n-12) [phone]*a(n-13) -8041265672017*a(n-14) [phone]*a(n-15) -12785808828112*a(n-16) [phone]*a(n-17) -2070180454016*a(n-18) -7015258833920*a(n-19) [phone]*a(n-20) [phone]*a(n-21) -4177948981504*a(n-22) [phone]*a(n-23) -1376634560512*a(n-24) [phone]*a(n-25) -46623096832*a(n-26) [phone]*a(n-27) -150994944*a(n-28) for n>30