A187436 Number of (n+1)X5 0..2 arrays with no 2X2 subblock commuting with any of its horizontal and vertical 2X2 subblock neighbors.

44195, 6858445, 1070374436, 167339492229, 26149356865336, 4086873166309438, 638715674028172903, 99822247953081225350, 15600784723214037939595, 2438179545769314063666737, 381052572245918940155221097

Offset

1,1

Comments

Column 4 of A187441

Links

R. H. Hardin, Table of n, a(n) for n = 1..109

Example

Some solutions for 3X5
..0..2..1..1..1....0..2..0..2..2....0..2..1..1..1....0..0..2..0..2
..0..0..0..2..2....0..2..1..0..2....0..0..1..2..2....0..1..0..1..1
..0..1..1..2..2....0..0..0..0..2....0..1..0..1..2....0..0..0..1..1

Crossrefs

Sequence in context: A190377 A049205 A234426 * A193055 A240099 A245483

Adjacent sequences: A187433 A187434 A187435 * A187437 A187438 A187439

Keyword

nonn

Author

R. H. Hardin, Mar 10 2011

Status

approved