A204785 Number of (n+1)X3 0..7 arrays with the permanents of all 2X2 subblocks equal and nonzero.

13555, 224843, 793645, 14627079, 59657161, 986079019, 4471465369, 66978872631, 331873877771, 4574719987785, 24439406840701, 314037243688927, 1789071497341345, 21658929764256197, 130381268078683017

Offset

1,1

Comments

Column 2 of A204791

Links

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

Example

Some solutions for n=4
..0..1..5....7..1..7....7..4..4....5..5..7....0..2..3....7..7..7....5..4..4
..2..0..2....5..7..5....6..0..6....4..5..2....7..0..7....3..6..3....4..0..4
..1..1..0....7..1..7....2..4..7....5..5..7....2..2..2....7..7..7....1..4..5
..0..2..2....5..7..5....6..0..6....4..5..2....7..0..7....4..5..4....4..0..4
..1..0..1....7..1..7....5..4..6....5..5..7....1..2..7....7..7..7....5..4..7

Crossrefs

Sequence in context: A342858 A064981 A275370 * A249526 A108418 A232447

Adjacent sequences: A204782 A204783 A204784 * A204786 A204787 A204788

Keyword

nonn

Author

R. H. Hardin, Jan 19 2012

Status

approved