A208708 Number of nX7 0..1 arrays with new values 0..1 introduced in row major order and no element equal to more than two of its immediate leftward or upward or right-upward antidiagonal neighbors

64, 4516, 334948, 24754628, 1830045552, 135288700496, 10001404535216, 739367693888784, 54658781788350480, 4040726220144359312, 298716287704524626960, 22083015695332916533648, 1632517550173528777448208

Offset

1,1

Comments

Column 7 of A208709

Links

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

Formula

Empirical: a(n) = 83*a(n-1) -710*a(n-2) +3004*a(n-3) -7952*a(n-4) +16752*a(n-5) -27360*a(n-6) +33984*a(n-7) -26368*a(n-8) for n>10

Example

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

Crossrefs

Sequence in context: A264345 A099369 A249393 * A189957 A146496 A058874

Adjacent sequences: A208705 A208706 A208707 * A208709 A208710 A208711

Keyword

nonn

Author

R. H. Hardin Mar 01 2012

Status

approved