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A203040 Number of (n+3)X(n+3) binary arrays with no more than one of any consecutive four bits set in any row or column 0
209, 2509, 53754, 1941572, 111839021, 10711347544, 1720766183538, 462798586473972, 206584733623719215 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A203048

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

Some solutions for n=3

..0..0..1..0..0..0....0..0..1..0..0..0....1..0..0..0..0..1....1..0..0..0..1..0

..0..0..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..0..0..0....0..0..0..1..0..0....0..0..0..0..1..0....0..0..0..0..0..0

..0..0..0..0..1..0....1..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0

..1..0..0..0..0..0....0..0..0..0..0..1....0..0..1..0..0..0....0..0..0..0..1..0

..0..0..1..0..0..0....0..0..0..0..0..0....1..0..0..0..0..0....1..0..0..0..0..1

CROSSREFS

Sequence in context: A316684 A235731 A235512 * A250951 A304765 A316509

Adjacent sequences:  A203037 A203038 A203039 * A203041 A203042 A203043

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 27 2011

STATUS

approved

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Last modified January 23 19:17 EST 2022. Contains 350515 sequences. (Running on oeis4.)