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A203485 Number of nX2 0..2 arrays with row sums equal and column sums unequal to adjacent columns 1
6, 10, 36, 82, 256, 676, 2050, 5826, 17568, 51640, 155590, 463996, 1397766, 4192646, 12626836, 37955426, 114267376, 343694728, 1034313190, 3111132672, 9359196778, 28146901826, 84646727920, 254509346220, 765178882006, 2300166018706 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A203491

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Sequence in context: A167330 A025629 A068889 * A221519 A038264 A094890

Adjacent sequences:  A203482 A203483 A203484 * A203486 A203487 A203488

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 02 2012

STATUS

approved

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Last modified October 19 22:55 EDT 2019. Contains 328244 sequences. (Running on oeis4.)