A202925 Number of nX2 0..2 arrays with adjacent row and column sums unequal

6, 52, 352, 2444, 17508, 124340, 872940, 6112832, 42822036, 299718840, 2094967284, 14630909636, 102130256404, 712606093984, 4970091031972, 34652009741528, 241529705097892, 1683093292484152, 11726099598816180, 81680440933444532

Offset

1,1

Comments

Column 2 of A202931

Links

R. H. Hardin, Table of n, a(n) for n = 1..187

Example

Some solutions for n=4
..2..2....2..1....2..0....1..0....1..0....1..1....0..1....1..1....2..2....2..0
..1..0....0..0....1..0....2..1....0..2....1..0....2..2....0..1....2..0....1..0
..0..0....2..0....0..0....0..1....1..2....1..1....1..2....1..2....0..0....1..1
..2..0....0..1....0..1....0..0....0..1....1..0....0..0....0..0....0..1....2..2

Crossrefs

Sequence in context: A080265 A357428 A292053 * A287082 A007974 A027111

Adjacent sequences: A202922 A202923 A202924 * A202926 A202927 A202928

Keyword

nonn

Author

R. H. Hardin Dec 26 2011

Status

approved