A188310 Number of (n+1)X9 binary arrays with every 2X2 subblock sum equal to exactly one or two horizontal and vertical neighbor 2X2 subblock sums

11828, 1694376, 77627954, 4280848766, 228625683370

Offset

1,1

Comments

Column 8 of A188311

Links

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

Example

Some solutions for 3X9
..0..0..0..0..1..0..0..1..1....0..0..0..1..0..0..0..1..0
..0..0..0..1..0..0..1..0..1....0..0..0..0..1..1..1..1..0
..0..1..0..0..1..1..0..1..1....0..0..1..0..1..1..1..0..1

Crossrefs

Sequence in context: A071519 A294661 A347144 * A185496 A249842 A251788

Adjacent sequences: A188307 A188308 A188309 * A188311 A188312 A188313

Keyword

nonn

Author

R. H. Hardin Mar 27 2011

Status

approved