A186839 Number of (n+2)X10 binary arrays with 3X3 subblock sums nondecreasing rightwards and downwards.

24748736, 897952936, 32614678623, 1078797163411, 20663923742904

Offset

1,1

Comments

Column 8 of A186840

Links

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

Example

Some solutions for 4X10
..0..0..0..0..0..1..0..0..0..0....0..0..0..0..0..0..0..0..1..1
..0..0..1..0..0..0..1..0..1..1....0..0..0..0..0..0..0..0..0..0
..0..0..0..0..0..0..0..0..0..1....0..0..0..0..0..1..0..0..1..0
..0..0..0..0..0..1..1..1..0..1....0..0..0..0..0..0..0..1..1..0

Crossrefs

Sequence in context: A083636 A124069 A257383 * A206084 A187439 A175580

Adjacent sequences: A186836 A186837 A186838 * A186840 A186841 A186842

Keyword

nonn

Author

R. H. Hardin, Feb 27 2011

Status

approved