A204627 Number of (n+1)X6 0..2 arrays with every 2X2 subblock having unequal diagonal elements or unequal antidiagonal elements, and new values 0..2 introduced in row major order

49152, 19923888, 8077061502, 3274427479938, 1327448018292252, 538145459458960020, 218163372078770313246, 88443107870080810695504, 35854704917808122995732308, 14535444261320212706089532832

Offset

1,1

Comments

Column 5 of A204630

Links

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

Formula

Empirical: a(n) = 460*a(n-1) -23188*a(n-2) +435694*a(n-3) -3658549*a(n-4) +11358936*a(n-5) +20419834*a(n-6) -191355445*a(n-7) +159553869*a(n-8) +865499344*a(n-9) -1132300188*a(n-10) -1371731191*a(n-11) +1522080017*a(n-12) +5670605*a(n-13) -262860202*a(n-14) +47382216*a(n-15)

Example

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

Crossrefs

Sequence in context: A309100 A236162 A331355 * A079400 A205625 A205360

Adjacent sequences: A204624 A204625 A204626 * A204628 A204629 A204630

Keyword

nonn

Author

R. H. Hardin Jan 17 2012

Status

approved