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A086943 a(n) = k where R(k+7) = 3. 3
23, 293, 2993, 29993, 299993, 2999993, 29999993, 299999993, 2999999993, 29999999993, 299999999993, 2999999999993, 29999999999993, 299999999999993, 2999999999999993, 29999999999999993, 299999999999999993 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

R(a(n)) = A086942(n).

LINKS

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

FORMULA

a(n) = 3*10^n - 7.

MATHEMATICA

FromDigits/@Table[Join[{2}, Table[9, {n}], {3}], {n, 0, 20}] (* Harvey P. Dale, Aug 21 2011 *)

PROG

(MAGMA) [3*10^n-7: n in [1..25] ]; // Vincenzo Librandi, Aug 22 2011

(Maxima) A086943(n):=3*10^n-7$

makelist(A086943(n), n, 1, 17); /* Martin Ettl, Nov 08 2012 */

CROSSREFS

Sequence in context: A268992 A199031 A125435 * A131273 A023021 A022651

Adjacent sequences:  A086940 A086941 A086942 * A086944 A086945 A086946

KEYWORD

nonn,easy

AUTHOR

Ray Chandler, Jul 24 2003

STATUS

approved

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Last modified October 13 16:10 EDT 2019. Contains 327966 sequences. (Running on oeis4.)