OFFSET
1,1
EXAMPLE
For n = 3, the third prime is 5, so a(3) = 111110000 (five 1's followed by four 0's).
MATHEMATICA
(* Technically this is in base 10 *) Table[10^(Prime[n] - 1)((10^Prime[n] - 1)/9), {n, 20}] (* Alonso del Arte, Dec 12 2012 *)
FromDigits[Join[PadRight[{}, #, 1], PadRight[{}, #-1, 0]]]&/@ Prime[ Range[ 10]] (* Harvey P. Dale, Aug 30 2015 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Omar E. Pol, Dec 12 2012
STATUS
approved