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A230945
Number of (n+3)X(4+3) 0..3 white square subarrays x(i,j) with each element diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 4, and upper left element zero
1
314, 1994, 85196, 606224, 22328204, 161835904, 6209914254, 44707108238, 1699524352562, 12251017200366, 466469474405852, 3361933958777160, 127984378310902748, 922429449651301216, 35115886181142148294
OFFSET
1,1
COMMENTS
Column 4 of A230949
FORMULA
Empirical recurrence of order 70 (see link above)
EXAMPLE
Some solutions for n=2
..0..x..1..x..3..x..3....0..x..1..x..1..x..3....0..x..0..x..0..x..2
..x..1..x..2..x..0..x....x..1..x..2..x..0..x....x..1..x..1..x..3..x
..2..x..2..x..1..x..3....0..x..2..x..3..x..3....0..x..2..x..3..x..2
..x..3..x..1..x..2..x....x..3..x..1..x..3..x....x..3..x..2..x..0..x
..2..x..0..x..1..x..1....2..x..2..x..0..x..2....2..x..2..x..1..x..3
CROSSREFS
Sequence in context: A050818 A050807 A157621 * A377769 A183691 A284078
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 01 2013
STATUS
approved