A275562 Number of nX5 0..2 arrays with no element equal to any value at offset (-2,0) (-1,2) or (0,-2) and new values introduced in order 0..2.

12, 288, 672, 3192, 13104, 57600, 248520, 1075140, 4663710, 20186982, 87477240, 378971730, 1641701760, 7112729712, 30813640998, 133494984432, 578341554336, 2505543992028, 10854800690652, 47026263554508, 203732097403680

Offset: 1

Author

R. H. Hardin, Aug 01 2016

Keywords

• nonn

Comments

Column 5 of A275565.

Examples

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

Links

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

Crossrefs

Cf. A275565.

Formula

Empirical: a(n) = a(n-1) +22*a(n-2) +8*a(n-3) -191*a(n-4) -156*a(n-5) +917*a(n-6) +837*a(n-7) -2936*a(n-8) -2248*a(n-9) +6832*a(n-10) +3015*a(n-11) -11514*a(n-12) -1236*a(n-13) +14699*a(n-14) -2370*a(n-15) -15138*a(n-16) +4822*a(n-17) +12804*a(n-18) -4364*a(n-19) -8775*a(n-20) +2339*a(n-21) +4703*a(n-22) -715*a(n-23) -1892*a(n-24) +91*a(n-25) +563*a(n-26) +8*a(n-27) -120*a(n-28) -3*a(n-29) +16*a(n-30) -a(n-32) for n>34