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A185801 Number of (n+1)X4 0..3 arrays with every 2X2 subblock trace equal to some horizontal or vertical neighbor 2X2 subblock trace 1
2176, 260544, 11019840, 593036512, 29410603520, 1501824774848, 75902079167968, 3849846787713472, 195020797157793152, 9883644801824753216, 500821360749453137312, 25378932404637289641888, 1286041655223168445633568 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A185807

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..200

EXAMPLE

Some solutions for 3X4

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

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

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

CROSSREFS

Sequence in context: A252522 A159712 A186917 * A170776 A250240 A157476

Adjacent sequences:  A185798 A185799 A185800 * A185802 A185803 A185804

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 04 2011

STATUS

approved

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Last modified December 3 05:05 EST 2021. Contains 349445 sequences. (Running on oeis4.)