A117829 Start with 3 and repeatedly reverse the digits and add 4 to get the next term.

3, 7, 11, 15, 55, 59, 99, 103, 305, 507, 709, 911, 123, 325, 527, 729, 931, 143, 345, 547, 749, 951, 163, 365, 567, 769, 971, 183, 385, 587, 789, 991, 203, 306, 607, 710, 21, 16, 65, 60, 10, 5, 9, 13, 35, 57, 79, 101, 105, 505, 509, 909, 913, 323, 327, 727, 731, 141, 145

Offset

1,1

Links

Table of n, a(n) for n=1..59.

N. J. A. Sloane and others, Sequences of RADD type, OEIS wiki.

Index entries for linear recurrences with constant coefficients, signature (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1).

Formula

Has period 54: see A117827, A117830.

Maple

read transforms; t1:=[3]; for n from 1 to 80 do t1:=[op(t1), 4+digrev(t1[n])]; od: # N. J. A. Sloane

Mathematica

f[n_] := 4 + FromDigits@ Reverse@ IntegerDigits@n; NestList[ f@# &, 3, 58] (* James C. McMahon, Sep 24 2024 *)

Crossrefs

Cf. A117827, A117828, A117830.

Sequence in context: A192114 A145052 A100900 * A166092 A375053 A184913

Adjacent sequences: A117826 A117827 A117828 * A117830 A117831 A117832

Keyword

nonn,base

Author

Luc Stevens (lms022(AT)yahoo.com), Apr 06 2006

Status

approved