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A209715 1/4 the number of (n+1)X8 0..3 arrays with every 2X2 subblock having distinct clockwise edge differences 1
3223192, 2118517533, 1308905451923, 830023337140244, 522757733883587522, 330369121707817687620, 208427296314737259382008, 131618147804621095447618893, 83072099151587827914461601665 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A209716

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..178

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A029820 A146976 A251529 * A235211 A219335 A203731

Adjacent sequences: A209712 A209713 A209714 * A209716 A209717 A209718

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 11 2012

STATUS

approved

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Last modified February 7 19:35 EST 2023. Contains 360128 sequences. (Running on oeis4.)