1,2

Column 1 of A188002

Table of n, a(n) for n=1..18.

All solutions for n=3

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

..0....0....0

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

Sequence in context: A148068 A148069 A148070 * A016021 A173669 A136703

Adjacent sequences: A187991 A187992 A187993 * A187995 A187996 A187997

nonn

R. H. Hardin Mar 18 2011

approved