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A204868 Number of (n+1)X(n+1) 0..3 arrays with the permanents of all 2X2 subblocks equal and nonzero 6
207, 3167, 53311, 4256141, 282748327, 94493071327, 24583374827519, 34898804015036761, 36258417235170928699 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A204876

LINKS

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

EXAMPLE

Some solutions for n=4

..3..3..3..0..3....3..1..1..1..2....1..3..0..3..2....0..1..1..3..1

..2..0..2..2..2....2..0..2..0..2....0..3..1..0..1....2..2..0..2..0

..0..3..2..1..2....0..1..2..1..0....1..0..1..3..2....0..1..1..1..1

..2..3..0..3..0....2..0..2..0..2....2..3..1..0..1....2..2..0..2..0

..2..0..2..1..2....3..1..0..1..2....1..0..1..3..0....0..1..1..3..1

CROSSREFS

Sequence in context: A217297 A205198 A205194 * A223650 A232346 A052093

Adjacent sequences:  A204865 A204866 A204867 * A204869 A204870 A204871

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 20 2012

STATUS

approved

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Last modified September 17 01:53 EDT 2021. Contains 347478 sequences. (Running on oeis4.)