A186046 Number of (n+2) X 5 binary arrays with each 3 X 3 subblock singular.

12278, 224698, 4071834, 69579654, 1231779874, 21790214094, 384595851458, 6808982811886, 120583672850434, 2135856648045198, 37846168273108354, 670699974248523022, 11887026695049436738, 210692726936282537230

Offset

1,1

Comments

Column 3 of A186052.

Links

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

Example

Some solutions for 4 X 5
..0..1..0..1..1....0..0..1..1..0....0..0..1..0..1....0..0..1..1..1
..1..1..0..1..1....0..0..1..1..0....0..0..0..0..1....0..0..1..0..0
..0..1..0..0..0....0..0..0..0..0....0..0..0..0..0....0..0..1..0..0
..0..0..0..1..1....1..1..1..0..1....0..1..1..0..0....1..0..0..1..1

Crossrefs

Cf. A186052.

Sequence in context: A254548 A254555 A254478 * A358320 A358022 A262625

Adjacent sequences: A186043 A186044 A186045 * A186047 A186048 A186049

Keyword

nonn

Author

R. H. Hardin, Feb 11 2011

Status

approved