A186870 Number of (n+1)X5 0..2 arrays with every 2X2 subblock sum equal to exactly one or two horizontal and vertical neighbor 2X2 subblock sums

3645, 285724, 12048996, 630235528, 30995088416

Offset

1,1

Comments

Column 4 of A186871

Links

Table of n, a(n) for n=1..5.

Example

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

Crossrefs

Sequence in context: A253452 A253464 A015294 * A185613 A232837 A252086

Adjacent sequences: A186867 A186868 A186869 * A186871 A186872 A186873

Keyword

nonn

Author

R. H. Hardin Feb 27 2011

Status

approved