A219309 Unchanging value maps: number of n X 7 binary arrays indicating the locations of corresponding elements unequal to no horizontal or vertical neighbor in a random 0..2 n X 7 array.

37, 1157, 43725, 1574278, 54797587, 1935133104, 68906619754, 2448261182674, 86782430779997

Offset

1,1

Comments

Column 7 of A219310.

Links

Table of n, a(n) for n=1..9.

Example

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

Crossrefs

Cf. A219310.

Sequence in context: A168166 A168165 A340539 * A099201 A218841 A246461

Adjacent sequences: A219306 A219307 A219308 * A219310 A219311 A219312

Keyword

nonn

Author

R. H. Hardin, Nov 17 2012

Status

approved