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A229401 Number of nX7 0..2 arrays with top left element 0, horizontal differences mod 3 never 1, vertical differences mod 3 never -1, and antidiagonal differences never 0 1
64, 610, 6604, 75965, 899860, 10826489, 131393852, 1602580515, 19601243880, 240116025296, 2943946903168, 36111350203982, 443068796520552, 5437043793984221, 66725434580737752, 818919799977995873 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 7 of A229402
LINKS
FORMULA
Empirical recurrence of order 64 (see link above)
EXAMPLE
Some solutions for n=4
..0..2..1..0..0..2..1....0..0..0..2..1..1..0....0..2..1..1..1..0..0
..0..2..1..1..0..2..1....1..1..0..2..2..1..1....1..0..2..2..1..1..0
..0..2..2..1..0..2..2....2..1..1..0..0..2..2....1..0..0..2..2..1..1
..1..0..0..2..1..0..0....2..2..1..1..1..0..0....2..1..1..0..0..2..2
CROSSREFS
Sequence in context: A208642 A301890 A302086 * A232052 A200788 A250355
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 22 2013
STATUS
approved

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Last modified March 19 03:17 EDT 2024. Contains 370952 sequences. (Running on oeis4.)