OFFSET
1,3
FORMULA
a(n) = concat(a(1), ..., a(n-1)) + a(n-1). - Charles R Greathouse IV, Mar 30 2004
EXAMPLE
a(3) = 1+11 = 12.
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Amarnath Murthy, Feb 17 2004
EXTENSIONS
More terms from Charles R Greathouse IV, Mar 30 2004
STATUS
approved