A118521 Define sequence S_m by: initial term = m, reverse digits and add 3 to get next term. Entry shows S_6. This reaches a cycle of length 6 in 2 steps.

6, 9, 12, 24, 45, 57, 78, 90, 12, 24, 45, 57, 78, 90, 12, 24, 45, 57, 78, 90, 12, 24, 45, 57, 78, 90, 12, 24, 45, 57, 78, 90, 12, 24, 45, 57, 78, 90, 12, 24, 45, 57, 78, 90, 12, 24, 45, 57, 78, 90, 12, 24, 45, 57, 78, 90, 12, 24, 45, 57, 78, 90, 12, 24, 45, 57, 78, 90

Offset: 1

Author

N. J. A. Sloane, May 06 2006

Keywords

• nonn
• base

Links

• 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, 1).

Crossrefs

Cf. A117831, A118517 on.

Programs

Mathematica

NestList[FromDigits[Reverse[IntegerDigits[#]]]+3&,6,70] (* Harvey P. Dale, Sep 25 2012 *)
Join[{6,9},LinearRecurrence[{0,0,0,0,0,1},{12,24,45,57,78,90},66]] (* Ray Chandler, Jul 18 2015 *)
PadRight[{6,9},100,{78,90,12,24,45,57}] (* Harvey P. Dale, Oct 03 2015 *)

Formula

a(n)=A118519(n+1). [From R. J. Mathar, Aug 08 2008]