A219740 Unmatched value maps: number of nX7 binary arrays indicating the locations of corresponding elements not equal to any horizontal, vertical or antidiagonal neighbor in a random 0..1 nX7 array

37, 277, 3606, 39905, 466288, 5350080, 61758332, 711479843, 8201909757, 94531063074, 1089590912023, 12558669019786, 144752526242487, 1668430514943073, 19230483410164823, 221652312986931867

Offset

1,1

Comments

Column 7 of A219741

Links

R. H. Hardin, Table of n, a(n) for n = 1..43

Formula

Zeilberger's Maple code (see links in A228285) would give a recurrence for this sequence. - N. J. A. Sloane, Aug 22 2013

Example

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

Crossrefs

Sequence in context: A144497 A219155 A139996 * A142835 A142234 A215632

Adjacent sequences: A219737 A219738 A219739 * A219741 A219742 A219743

Keyword

nonn

Author

R. H. Hardin Nov 26 2012

Status

approved