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A224720 Number of (n+3)X(n+3) 0..2 matrices with each 4X4 subblock idempotent 0
2052, 1920, 3092, 3924, 4498, 7090, 11268, 16568, 22726, 32326, 47310, 69124, 98934, 141122, 202398, 291280, 417790, 597382, 853688, 1220732, 1744804, 2491066, 3553342, 5066576, 7221562, 10287590, 14646626, 20842212, 29645776 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A224728

LINKS

Table of n, a(n) for n=1..29.

EXAMPLE

Some solutions for n=2

..1..0..0..0..1....1..1..2..2..2....1..1..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..2....0..0..0..0..0....0..0..0..0..0....0..0..0..0..0

..2..0..0..0..1....0..0..0..0..0....0..0..0..0..1....0..0..0..0..0

..1..0..0..0..1....1..2..1..1..1....0..0..0..0..1....0..0..1..1..1

CROSSREFS

Sequence in context: A168176 A224728 A224721 * A320277 A322102 A206068

Adjacent sequences:  A224717 A224718 A224719 * A224721 A224722 A224723

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 16 2013

STATUS

approved

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Last modified July 24 06:56 EDT 2021. Contains 346273 sequences. (Running on oeis4.)