0,2

f := n->2*3^(2*n-2)-3^(n-1);

Sequence in context: A021124 A004322 A125403 this_sequence A017389 A098685 A006096

Adjacent sequences: A010032 A010033 A010034 this_sequence A010036 A010037 A010038

nonn

Steve King (ITTTUCSON(AT)aol.com)