A208712 Number of 5Xn 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

16, 512, 9604, 204020, 4226368, 87985748, 1830045552, 38070302740, 791949216708, 16474443378336, 342707611610988, 7129134738677660, 148302981848252912, 3085055246536395480, 64176496980568384684, 1335023990202619369508

Offset

1,1

Comments

Row 5 of A208709

Links

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

Formula

Empirical: a(n) = 17*a(n-1) +95*a(n-2) -269*a(n-3) -1372*a(n-4) +1500*a(n-5) +6585*a(n-6) -5267*a(n-7) -11175*a(n-8) +10357*a(n-9) +1757*a(n-10) -3001*a(n-11) +237*a(n-12) +207*a(n-13) -30*a(n-14) for n>17

Example

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

Crossrefs

Sequence in context: A302072 A302811 A303472 * A305520 A316957 A298967

Adjacent sequences: A208709 A208710 A208711 * A208713 A208714 A208715

Keyword

nonn

Author

R. H. Hardin Mar 01 2012

Status

approved