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A224560 Number of (n+3)X(n+3) 0..1 matrices with each 4X4 subblock idempotent 0
452, 340, 514, 752, 974, 1550, 2526, 3918, 5716, 8536, 12978, 19670, 29226, 43204, 63992, 94856, 139914, 205488, 301196, 441124, 644948, 940908, 1370156, 1992618, 2894276, 4198330, 6081892, 8800132, 12719614, 18365760 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A224568

LINKS

Table of n, a(n) for n=1..30.

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A020268 A066322 A128922 * A224568 A224561 A116308

Adjacent sequences:  A224557 A224558 A224559 * A224561 A224562 A224563

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 10 2013

STATUS

approved

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Last modified April 15 20:19 EDT 2021. Contains 342977 sequences. (Running on oeis4.)