A208869 Number of nX5 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than one of its immediate leftward or upward or right-upward antidiagonal neighbors.

51, 24472, 14493405, 8624977114, 5134914951163, 3057224057476808, 1820216057105650386, 1083724145919960847502, 645230025599333921071976, 384158448692090971917060268, 228721088397696942173901117684

Offset: 1

Author

R. H. Hardin Mar 02 2012

Keywords

• nonn

Comments

Column 5 of A208872

Examples

			Some solutions for n=4
..0..0..1..2..0....0..0..0..0..0....0..0..0..0..0....0..1..1..0..0
..3..3..0..1..0....1..1..2..1..0....1..1..1..2..0....0..2..0..1..2
..1..2..1..2..0....2..3..1..3..3....2..0..2..0..1....1..1..3..1..0
..0..1..0..3..2....1..2..3..0..1....2..1..3..0..0....0..1..0..2..3
		

Links

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

Formula

Empirical: a(n) = 698*a(n-1) -64930*a(n-2) +2349972*a(n-3) -40985428*a(n-4) [phone]*a(n-5) -2071312484*a(n-6) [phone]*a(n-7) -22247002672*a(n-8) [phone]*a(n-9) -163887803568*a(n-10) [phone]*a(n-11) -285817496832*a(n-12) [phone]*a(n-13) -46819296000*a(n-14) [phone]*a(n-15) for n>16