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

64, 610, 6604, 75965, 899860, 10826489, 131393852, 1602580515, 19601243880, 240116025296, 2943946903168, 36111350203982, 443068796520552, 5437043793984221, 66725434580737752, 818919799977995873

Offset

1,1

Comments

Column 7 of A229402

Links

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

R. H. Hardin, Empirical recurrence of order 64

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

Adjacent sequences: A229398 A229399 A229400 * A229402 A229403 A229404

Keyword

nonn

Author

R. H. Hardin Sep 22 2013

Status

approved