A185773 Number of (n+1)X4 0..2 arrays with no 2X2 subblock sum equal to any horizontal or vertical neighbor 2X2 subblock sum

3844, 89118, 2046098, 48744342, 1154712762, 27239862108, 641595944400, 15156754839024, 357869357090800, 8446854770875602, 199334639825139922, 4705555692884330894, 111074885127703334276, 2621814014876365014966

Offset

1,1

Comments

Column 3 of A185777

Links

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

Example

Some solutions for 3X4
..2..1..0..2....2..1..1..1....2..2..0..1....1..1..2..2....0..0..0..1
..1..1..0..2....2..0..0..1....2..0..0..2....0..1..1..1....0..1..2..1
..0..0..2..1....1..1..2..2....0..2..1..2....0..1..1..2....1..2..2..0

Crossrefs

Sequence in context: A234827 A253291 A253161 * A031560 A180505 A252878

Adjacent sequences: A185770 A185771 A185772 * A185774 A185775 A185776

Keyword

nonn

Author

R. H. Hardin Feb 03 2011

Status

approved