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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 (list; graph; refs; listen; history; text; internal format)
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^n-3), {n, 17}]

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

PROG

(MAGMA) [3*(10^n-3): 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

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Last modified December 15 11:43 EST 2019. Contains 329999 sequences. (Running on oeis4.)