OFFSET
0,2
LINKS
Harry J. Smith, Table of n, a(n) for n = 0..1000
FORMULA
MATHEMATICA
Total/@(IntegerDigits/@(11^Range[0, 60])) (* Harvey P. Dale, Nov 02 2011 *)
PROG
(PARI) a(n) = sumdigits(11^n); \\ Michel Marcus, Nov 01 2013
CROSSREFS
KEYWORD
nonn,base
AUTHOR
N. J. A. Sloane, Dec 11 2001
STATUS
approved