A184598 1/4 the number of (n+1) X 4 binary arrays with equal numbers of 2 X 2 subblocks with sums 1 and 3.

16, 156, 1986, 28192, 411825, 6045460, 89538170, 1339793447, 20215904926, 306972320468, 4684471214542, 71777709052696, 1103593885196101, 17017816693554841, 263086943851348011, 4076187315351054647

Offset

1,1

Comments

Column 3 of A184604.

Links

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

Example

Some solutions for 3 X 4:
..1..1..1..0....1..0..1..0....1..1..1..1....1..0..0..0....0..0..1..0
..0..1..0..1....0..0..1..1....0..1..1..1....0..1..1..0....1..0..0..1
..0..0..0..1....0..1..1..1....0..0..0..0....1..1..1..0....1..1..1..1

Crossrefs

Sequence in context: A144499 A173763 A155649 * A258460 A320548 A211831

Adjacent sequences: A184595 A184596 A184597 * A184599 A184600 A184601

Keyword

nonn

Author

R. H. Hardin, Jan 18 2011

Status

approved