A210331 - OEIS

A210331

1/4 the number of (n+1)X5 0..3 arrays with every 2X2 subblock having two or three distinct clockwise edge differences

43519, 10050240, 2266459861, 517186072378, 117888703860657, 26888341896724303, 6132398417786621509, 1398664622985458705816, 319003606034212278008442, 72757672377463379280503789

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OFFSET

1,1

COMMENTS

Column 4 of A210335

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A126771 A103875 A224623 * A233690 A205923 A251995

Adjacent sequences: A210328 A210329 A210330 * A210332 A210333 A210334

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 20 2012

STATUS

approved