A189248 Number of nX3 array permutations with each element making zero or one king moves.

3, 152, 2961, 76629, 1818336, 44308389, 1070959431, 25950094568, 628311228261, 15216392096673, 368483172355520, 8923455937553017, 216095445904425947, 5233099961163002488, 126727881793625193513, 3068918844981224041565

Offset: 1

Author

R. H. Hardin Apr 19 2011

Keywords

• nonn

Comments

Column 3 of A189254

Examples

			Some solutions for 4X3
..3..5..1....1..2..4....3..0..2....1..3..5....4..2..1....1..4..5....1..0..5
..0..7..2....3..0..7....1..7..4....6..0..2....0..7..8....7..0..2....3..8..2
..6..4.10....6..5.11....6..5.11....9.11..4....3..6..5....3..9.11....9.11..4
..9..8.11....9.10..8....9.10..8....7..8.10...10..9.11...10..6..8....6..7.10
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..200

Formula

Empirical: a(n) = 20*a(n-1) +125*a(n-2) -566*a(n-3) +249*a(n-4) +916*a(n-5) -1703*a(n-6) +256*a(n-7) +691*a(n-8) -30*a(n-9) -9*a(n-10)