A198595 Number of 2nX6 0..3 arrays with values 0..3 introduced in row major order and each element equal to an odd number of horizontal and vertical neighbors

272, 511661, 1208560656, 3082580273539, 8057520048724340

Offset

1,1

Comments

Column 3 of A198596

Links

Table of n, a(n) for n=1..5.

Example

Some solutions for n=2
..0..1..1..0..0..1....0..1..2..3..3..0....0..0..1..1..2..2....0..1..2..3..2..2
..0..0..2..2..3..1....0..1..2..1..1..0....1..1..2..2..1..1....0..1..2..3..1..1
..0..1..3..3..3..3....1..2..3..0..3..1....0..0..3..0..3..3....1..2..3..1..3..3
..1..1..1..3..1..1....1..2..3..0..3..1....2..2..3..0..2..2....1..2..3..1..2..2

Crossrefs

Sequence in context: A331655 A225833 A198289 * A028467 A203758 A028679

Adjacent sequences: A198592 A198593 A198594 * A198596 A198597 A198598

Keyword

nonn

Author

R. H. Hardin Oct 27 2011

Status

approved