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A215744
Number of horizontal, vertical, diagonal and antidiagonal neighbor colorings of the odd squares of an n X 7 array with new integer colors introduced in row major order.
1
1, 2, 52, 1474, 908408, 190497926, 621070325112, 358497142120168, 3338879032079931702, 3860992971424257181362, 78078252717220869748888110, 153766323558842595930324743030, 5766825640795432616276139021743234, 17510035018053058214986518337659927378
OFFSET
0,2
LINKS
EXAMPLE
Some solutions for n=3:
..x..0..x..1..x..2..x....x..0..x..1..x..2..x....x..0..x..1..x..2..x
..1..x..3..x..0..x..4....3..x..4..x..5..x..1....3..x..4..x..3..x..5
..x..5..x..4..x..6..x....x..6..x..7..x..0..x....x..5..x..6..x..1..x
CROSSREFS
Column 7 of A215745.
Sequence in context: A101930 A297756 A174779 * A099882 A216611 A246485
KEYWORD
nonn
AUTHOR
R. H. Hardin, Aug 22 2012
EXTENSIONS
a(0)=1 prepended and terms a(7) and beyond from Andrew Howroyd, Jun 26 2017
STATUS
approved