A233016 Number of nX6 0..3 arrays with no element x(i,j) adjacent to value 3-x(i,j) horizontally or vertically, top left element zero, and 1 appearing before 2 in row major order

122, 25211, 5249894, 1093911305, 227962456547, 47506658438246, 9900284810558324, 2063199965393914025, 429966921427300038587, 89604286897966759599656, 18673362774649874902634054

Offset

1,1

Comments

Column 6 of A233018

Links

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

Formula

Empirical: a(n) = 313*a(n-1) -25836*a(n-2) +915863*a(n-3) -16213670*a(n-4) +144756201*a(n-5) -517271096*a(n-6) -1142631169*a(n-7) +16130100519*a(n-8) -49834494904*a(n-9) +41222570902*a(n-10) +81411834252*a(n-11) -186980689770*a(n-12) +120589827444*a(n-13) -21008679048*a(n-14)

Example

Some solutions for n=2
..0..1..3..2..3..2....0..1..1..0..2..2....0..1..3..1..1..0....0..1..3..2..3..1
..1..0..2..3..3..2....1..3..3..2..0..0....0..1..3..3..1..1....2..0..1..0..1..0

Crossrefs

Sequence in context: A275350 A208565 A209098 * A282055 A233080 A280678

Adjacent sequences: A233013 A233014 A233015 * A233017 A233018 A233019

Keyword

nonn

Author

R. H. Hardin, Dec 03 2013

Status

approved