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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. 1
16, 156, 1986, 28192, 411825, 6045460, 89538170, 1339793447, 20215904926, 306972320468, 4684471214542, 71777709052696, 1103593885196101, 17017816693554841, 263086943851348011, 4076187315351054647 (list; graph; refs; listen; history; text; internal format)
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

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Last modified May 14 19:53 EDT 2021. Contains 343903 sequences. (Running on oeis4.)