1,1

Column 6 of A215959

Table of n, a(n) for n=1..8.

Some solutions for n=4

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

..x..1..x..3..x..0....x..1..x..3..x..4....x..3..x..4..x..0....x..2..x..0..x..3

..3..x..2..x..0..x....1..x..0..x..5..x....1..x..5..x..0..x....1..x..0..x..4..x

..x..4..x..5..x..6....x..5..x..1..x..3....x..0..x..3..x..6....x..3..x..5..x..6

Sequence in context: A264669 A187546 A195005 * A171732 A291903 A340863

Adjacent sequences: A215954 A215955 A215956 * A215958 A215959 A215960

nonn

R. H. Hardin Aug 28 2012

approved