A238724 Number of nX6 0..2 arrays with no element equal to the sum modulo 3 of elements to its left or elements above it

8, 64, 704, 4636, 48538, 296384, 3022230, 17949864, 180550234, 1061806368, 10600024286, 62140749704, 617608768008, 3618173053808, 35862152511062, 210135126555696, 2079126382654402, 12188142518006216, 120451983593221798

Offset

1,1

Comments

Column 6 of A238726

Links

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

R. H. Hardin, Empirical recurrence of order 90

Formula

Empirical recurrence of order 90 (see link above)

Example

Some solutions for n=5
..1..2..1..2..1..2....2..1..2..1..2..1....2..1..1..2..2..1....2..1..2..1..2..1
..2..0..0..0..0..0....1..2..1..0..0..0....1..2..2..0..0..0....1..2..1..0..0..0
..2..0..0..0..0..1....1..2..1..2..1..0....1..2..1..0..0..0....2..1..2..0..1..2
..1..0..2..1..2..2....2..0..0..1..1..0....2..0..0..0..1..2....1..2..1..2..2..1
..1..0..2..1..2..1....1..0..0..0..0..2....1..0..0..0..2..2....1..2..1..2..1..0

Crossrefs

Sequence in context: A355214 A047900 A204212 * A318640 A088038 A061435

Adjacent sequences: A238721 A238722 A238723 * A238725 A238726 A238727

Keyword

nonn

Author

R. H. Hardin, Mar 03 2014

Status

approved