A083909 Numbers of the form 10^(m-k)*(10^(m+k+1)-10^k), m, k >= 0.

9, 990, 99900, 9999000, 999990000, 99999900000, 9999999000000, 999999990000000, 99999999900000000, 9999999999000000000, 999999999990000000000, 99999999999900000000000, 9999999999999000000000000, 999999999999990000000000000, 99999999999999900000000000000

Offset: 1

Author

Marco Matosic, Jun 19 2003

Keywords

• easy
• nonn

Crossrefs

Cf. A006516, A079598.

Programs

Mathematica

Table[FromDigits[Join[PadRight[{},n,9],PadRight[{},n-1,0]]],{n,15}] (* Harvey P. Dale, Jul 25 2016 *)

Extensions

More terms from Harvey P. Dale, Jul 25 2016