A205315 Number of (n+1)X6 0..1 arrays with every 2X2 subblock having the same number of equal edges, and new values 0..1 introduced in row major order

488, 7784, 126536, 2068148, 33865634, 554916092, 9094954742, 149077423220, 2443638951908, 40055966781734, 656597489663162, 10762963773161732, 176426890096852634, 2891996520924867398, 47405724154180563434

Offset

1,1

Comments

Column 5 of A205318

Links

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

Formula

Empirical: a(n) = 31*a(n-1) -321*a(n-2) +1569*a(n-3) -4179*a(n-4) +6420*a(n-5) -5671*a(n-6) +2668*a(n-7) -516*a(n-8)

Example

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

Crossrefs

Sequence in context: A126819 A045011 A253336 * A118449 A223398 A214334

Adjacent sequences: A205312 A205313 A205314 * A205316 A205317 A205318

Keyword

nonn

Author

R. H. Hardin Jan 25 2012

Status

approved