

A086947


Numbers k such that Reverse(k+9) = 3.


4



21, 291, 2991, 29991, 299991, 2999991, 29999991, 299999991, 2999999991, 29999999991, 299999999991, 2999999999991, 29999999999991, 299999999999991, 2999999999999991, 29999999999999991, 299999999999999991
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OFFSET

1,1


COMMENTS

Reverse(a(n)) = A086948(n).
If k is in this sequence then Reverse(k) = (2/3)*k  2. Also A101703 is the sequence of all numbers k such that Reverse(k) = (2/3)*k  2. So this sequence is a subsequence of A101703.  Farideh Firoozbakht, Dec 30 2004


LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..300


FORMULA

a(n) = 3*(10^n  3).


MATHEMATICA

Table[3*(10^n3), {n, 17}]
Table[FromDigits[PadRight[{3}, n, 0]], {n, 2, 20}]9 (* Harvey P. Dale, Nov 27 2012 *)


PROG

(MAGMA) [3*(10^n3): n in [1..25] ]; // Vincenzo Librandi, Aug 22 2011


CROSSREFS

Cf. A085331, A086948, A101700, A101703.
Sequence in context: A183731 A101703 A102018 * A230768 A230021 A101700
Adjacent sequences: A086944 A086945 A086946 * A086948 A086949 A086950


KEYWORD

nonn,base


AUTHOR

Ray Chandler, Jul 24 2003


STATUS

approved



