1,1

Column 2 of A209593

R. H. Hardin, Table of n, a(n) for n = 1..30

a(n) = 3 ^ (2*n-(n modulo 2)) * 15 ^ ((n*n-2*n+(n modulo 2))/4)

Some solutions for n=3

..1..1..1....2..0..1....0..1..1....2..0..2....2..0..0....0..2..1....0..2..0

..1..2..2....0..1..2....1..2..1....2..1..0....0..0..0....2..1..0....1..1..2

..0..2..0....1..2..0....0..1..2....1..2..0....0..0..1....1..0..2....0..1..2

Sequence in context: A116179 A013732 A292974 * A223736 A207229 A223717

Adjacent sequences: A209584 A209585 A209586 * A209588 A209589 A209590

nonn

R. H. Hardin Mar 10 2012

approved