1,2
For n>4 it appears that a(n)=4a(n-1)+4.
Sequence in context: A030924 A030831 A058767 * A158569 A020106 A099928
Adjacent sequences: A075873 A075874 A075875 * A075877 A075878 A075879
nonn
John W. Layman (layman(AT)math.vt.edu), Oct 16 2002