A203492 Number of 2Xn 0..2 arrays with row sums equal and column sums unequal to adjacent columns

3, 10, 80, 556, 3348, 20596, 134412, 888232, 5836068, 38457456, 255381636, 1704162724, 11399565860, 76433483528, 513785171540, 3461284463632, 23360156262164, 157908381404144, 1068981156413892, 7246198178206132

Offset

1,1

Comments

Row 2 of A203491

Links

R. H. Hardin, Table of n, a(n) for n = 1..97

Example

Some solutions for n=5
..0..2..0..2..2....1..0..1..2..0....2..1..0..2..1....1..1..1..2..1
..0..1..2..2..1....2..0..2..0..0....2..2..1..1..0....1..2..1..1..1

Crossrefs

Sequence in context: A027159 A236696 A262259 * A320258 A136554 A359970

Adjacent sequences: A203489 A203490 A203491 * A203493 A203494 A203495

Keyword

nonn

Author

R. H. Hardin Jan 02 2012

Status

approved