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A204724 Number of (n+1)X(n+1) 0..4 arrays with the permanents of all 2X2 subblocks equal and nonzero 1
544, 12744, 264998, 45026614, 3884003062, 3923500974342, 1379568377068438 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A204732

LINKS

Table of n, a(n) for n=1..7.

EXAMPLE

Some solutions for n=4

..1..0..1..2..0....3..4..1..4..3....1..2..4..0..4....3..1..3..1..1

..4..4..0..4..2....1..2..2..2..1....4..0..4..2..2....2..1..2..1..4

..0..1..1..2..0....3..4..1..4..3....1..2..4..0..4....3..1..3..1..1

..4..2..2..0..2....1..2..2..2..1....3..2..0..2..1....2..1..2..1..4

..0..1..1..2..0....3..4..1..4..3....4..0..4..4..2....3..1..3..1..1

CROSSREFS

Sequence in context: A204732 A204725 A266136 * A168564 A223376 A022048

Adjacent sequences:  A204721 A204722 A204723 * A204725 A204726 A204727

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 18 2012

STATUS

approved

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Last modified October 19 17:24 EDT 2021. Contains 348091 sequences. (Running on oeis4.)