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A215743
Number of horizontal, vertical, diagonal and antidiagonal neighbor colorings of the odd squares of an n X 6 array with new integer colors introduced in row major order.
2
1, 2, 15, 364, 29084, 4851360, 1396243937, 621070325112, 397357555166874, 347527814415145984, 399998919849572992699, 588252794234398220649896, 1079540725180986409339750810, 2424777953471684438806091877856, 6559018912065982947335186853751568
OFFSET
0,2
LINKS
EXAMPLE
Some solutions for n=3:
..x..0..x..1..x..2....x..0..x..1..x..2....x..0..x..1..x..2....x..0..x..1..x..0
..3..x..4..x..0..x....3..x..2..x..3..x....2..x..3..x..4..x....2..x..3..x..4..x
..x..2..x..5..x..4....x..4..x..0..x..1....x..1..x..2..x..1....x..5..x..2..x..1
CROSSREFS
Column 6 of A215745 and column 6 of A215847.
Sequence in context: A175563 A231443 A068391 * A254224 A071102 A272899
KEYWORD
nonn
AUTHOR
R. H. Hardin, Aug 22 2012
EXTENSIONS
a(0)=1 prepended and terms a(9) and beyond from Andrew Howroyd, Jun 25 2017
STATUS
approved