A232523 Number of (n+1)X(1+1) 0..3 arrays x(i,j) with every row sum{j*x(i,j), j=1..1+1} equal, and every column sum{i*x(i,j), i=1..n+1} equal, with top left element <= 1

4, 4, 2, 8, 10, 2, 22, 36, 2, 94, 158, 2, 464, 804, 2, 2468, 4356, 2, 13740, 24538, 2, 79006, 142346, 2, 465374, 844154, 2, 2793340, 5094494, 2, 17024342, 31187522, 2, 105069752, 193197732, 2, 655339708, 1208811268, 2, 4124342730, 7628174840, 2

Offset

1,1

Comments

Column 1 of A232526

Links

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

Example

Some solutions for n=7
..1..2....0..1....1..3....0..2....0..1....0..2....0..1....0..1....1..2....0..2
..1..2....2..0....3..2....0..2....2..0....2..1....0..1....0..1....3..1....2..1
..1..2....0..1....3..2....2..1....2..0....0..2....0..1....2..0....3..1....2..1
..1..2....2..0....3..2....0..2....0..1....2..1....2..0....2..0....1..2....2..1
..3..1....0..1....1..3....0..2....0..1....2..1....0..1....2..0....1..2....0..2
..1..2....2..0....1..3....2..1....0..1....2..1....0..1....0..1....1..2....0..2
..3..1....0..1....3..2....2..1....2..0....2..1....0..1....0..1....3..1....2..1
..1..2....0..1....3..2....2..1....0..1....0..2....2..0....0..1....1..2....2..1

Crossrefs

Sequence in context: A010778 A202322 A365797 * A376878 A224821 A034933

Adjacent sequences: A232520 A232521 A232522 * A232524 A232525 A232526

Keyword

nonn

Author

R. H. Hardin, Nov 25 2013

Status

approved