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A209951 T(n,k)=Half the number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock having at most one duplicate clockwise edge difference 9
34, 258, 258, 1956, 4975, 1956, 14832, 95794, 95794, 14832, 112464, 1845126, 4681176, 1845126, 112464, 852768, 35537484, 228881560, 228881560, 35537484, 852768, 6466176, 684469520, 11189540644, 28414622976, 11189540644, 684469520 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

.......34..........258.............1956...............14832

......258.........4975............95794.............1845126

.....1956........95794..........4681176...........228881560

....14832......1845126........228881560.........28414622976

...112464.....35537484......11189540644.......3526904366260

...852768....684469520.....547050257224.....437792367422004

..6466176..13183187396...26744766723116...54342179402121844

.49030272.253914272972.1307528820052772.6745399989408922240

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..264

EXAMPLE

Some solutions for n=4 k=3

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

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

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

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

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

CROSSREFS

Sequence in context: A302474 A183319 A190422 * A209944 A081219 A254700

Adjacent sequences:  A209948 A209949 A209950 * A209952 A209953 A209954

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Mar 16 2012

STATUS

approved

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Last modified August 18 22:28 EDT 2022. Contains 356215 sequences. (Running on oeis4.)