A240516 Number of n X 5 0..1 arrays with no element equal to exactly two horizontal and vertical neighbors, with new values 0..1 introduced in row major order.

8, 21, 73, 326, 1376, 6205, 28942, 135093, 636475, 3024792, 14429369, 69010353, 330906118, 1589431389, 7642628408, 36779710534, 177110221193, 853219818189, 4111568990816, 19817506062480, 95533854083563, 460587995304966

Offset

1,1

Comments

Column 5 of A240519.

Links

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

Example

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

Crossrefs

Cf. A240519.

Sequence in context: A096018 A297647 A267144 * A079386 A156304 A232049

Adjacent sequences: A240513 A240514 A240515 * A240517 A240518 A240519

Keyword

nonn

Author

R. H. Hardin, Apr 06 2014

Status

approved