A188369 Number of (n+1)X4 0..3 arrays with every 2X2 subblock sum equal to exactly one or two horizontal and vertical neighbor 2X2 subblock sums

1936, 315520, 11342816, 716732884, 34292827560, 1927798104328

Offset

1,1

Comments

Column 3 of A188370

Links

Table of n, a(n) for n=1..6.

Example

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

Crossrefs

Sequence in context: A237010 A256765 A264109 * A185570 A367679 A031766

Adjacent sequences: A188366 A188367 A188368 * A188370 A188371 A188372

Keyword

nonn

Author

R. H. Hardin Mar 29 2011

Status

approved