OFFSET
1,2
MATHEMATICA
a=1; b=2; lst={a, b}; Do[c=2*a*b-b; AppendTo[lst, c]; a=b; b=c, {n, 12}]; lst
RecurrenceTable[{a[1]==1, a[2]==2, a[n]==2a[n-2]a[n-1]-a[n-1]}, a, {n, 14}] (* Harvey P. Dale, Jan 27 2012 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Vladimir Joseph Stephan Orlovsky, Feb 09 2010
STATUS
approved