A206068 Number of (n+1)X5 0..2 arrays with every 2X3 or 3X2 subblock having exactly three clockwise edge increases

2052, 18534, 233058, 2991276, 38532894, 496478790, 6395526408, 82373437782, 1060879148706, 13662475703964, 175948512210702, 2265887036317230, 29180261434926696, 375784836992665662, 4839370893893451258

Offset

1,1

Comments

Column 4 of A206072

Links

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

Formula

Empirical: a(n) = 25*a(n-1) -206*a(n-2) +741*a(n-3) -1371*a(n-4) +1388*a(n-5) -844*a(n-6) +228*a(n-7) +4*a(n-8) for n>13

Example

Some solutions for n=4
..2..1..0..1..0....0..2..1..0..2....0..1..0..2..1....0..0..2..1..2
..0..2..1..0..1....2..0..2..1..0....2..0..1..0..2....2..1..0..2..0
..1..0..2..1..2....1..2..1..2..1....0..1..0..1..0....0..2..1..0..1
..2..1..0..2..0....2..0..2..1..2....1..2..1..0..1....1..0..2..1..0
..0..2..1..0..1....0..1..0..2..1....2..0..2..1..2....0..1..0..2..1

Crossrefs

Sequence in context: A224720 A320277 A322102 * A280021 A168190 A238934

Adjacent sequences: A206065 A206066 A206067 * A206069 A206070 A206071

Keyword

nonn

Author

R. H. Hardin Feb 03 2012

Status

approved