A205307 Number of n X 5 0..3 arrays with no occurrence of three equal elements in a row horizontally or vertically, and new values 0..3 introduced in row major order.

40, 31168, 19490790, 13049279920, 8615950028840, 5705396521337690, 3775750320744043966, 2499057571450100571862, 1654008038632602002195374, 1094715856585124185784208270, 724543877252168299768908602288, 479543578578238224536612339956838, 317388689777679827724542588307647638

Offset: 1

Author

R. H. Hardin, Jan 25 2012

Keywords

• nonn

Examples

			Some solutions for n=5:
..0..0..1..1..2....0..1..0..1..0....0..1..1..0..0....0..1..0..2..0
..0..2..2..1..2....0..0..1..1..2....0..0..1..0..0....3..3..0..1..3
..1..0..1..0..3....3..2..3..0..1....1..2..3..1..1....2..1..1..2..1
..2..0..1..3..2....1..1..2..2..1....2..0..1..0..0....1..0..2..0..3
..0..1..0..0..1....2..3..0..1..2....0..0..3..0..1....0..0..2..1..1
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..96

Crossrefs

Column 5 of A205310.