OFFSET
1,2
EXAMPLE
a(2) = 81, a(3) = 19881 = 141^2 is obtained by prefixing 198 =3*66, to 81.
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Amarnath Murthy, Sep 21 2003
EXTENSIONS
Corrected and extended by Hans Havermann, Mar 01 2004
STATUS
approved