A118525 Start with 1 and repeatedly reverse the digits and add 6 to get the next term.

1, 7, 13, 37, 79, 103, 307, 709, 913, 325, 529, 931, 145, 547, 751, 163, 367, 769, 973, 385, 589, 991, 205, 508, 811, 124, 427, 730, 43, 40, 10, 7, 13, 37, 79, 103, 307, 709, 913, 325, 529, 931, 145, 547, 751, 163, 367, 769, 973, 385, 589, 991

Offset: 1

Author

N. J. A. Sloane, May 06 2006

Keywords

• nonn
• base

Comments

After the initial term, the sequence enters the cycle (7, 13, 37, ..., 10) of length 30.

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, 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).

Crossrefs

Cf. A117828, A117816, A117817.

Programs

Mathematica

NestList[FromDigits[Reverse[IntegerDigits[#]]]+6&,1,60]  (* Harvey P. Dale, Apr 22 2011 *)

PARI

a(n,s=1)={n>1&&for(i=0,(n-2)%30,s=R(s)+6);s} \\ R =  A004086. - M. F. Hasler, May 22 2014

Formula

a(n) = a((n-2 mod 30)+2) for all n>1. - M. F. Hasler, May 22 2014