A241105 Number of nX5 0..2 arrays with no element equal to one or three horizontal or vertical neighbors, with new values 0..2 introduced in row major order.

8, 116, 1522, 19814, 259388, 3374086, 44030862, 574246744, 7489718098, 97685897406, 1274061880332, 16617079770494, 216729255718838, 2826706576812536, 36867513064014682, 480847045785788134

Offset: 1

Author

R. H. Hardin, Apr 16 2014

Keywords

• nonn

Comments

Column 5 of A241108

Examples

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

Links

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

Formula

Empirical: a(n) = 14*a(n-1) +2*a(n-2) -175*a(n-3) -54*a(n-4) +1648*a(n-5) -42588*a(n-6) -24344*a(n-7) +167248*a(n-8) +247904*a(n-9) -88832*a(n-10) [phone]*a(n-11) [phone]*a(n-12) [phone]*a(n-13) -32276480*a(n-14) -600080384*a(n-15) -9134145536*a(n-16) -11089739776*a(n-17) -2071986176*a(n-18) [phone]*a(n-19) [phone]*a(n-20) [phone]*a(n-21) [phone]*a(n-22) [phone]*a(n-23) [phone]*a(n-24) -6597069766656*a(n-25) -17592186044416*a(n-26)