A118528 Start with 1 and repeatedly reverse the digits and add 11 to get the next term.

1, 12, 32, 34, 54, 56, 76, 78, 98, 100, 12, 32, 34, 54, 56, 76, 78, 98, 100, 12, 32, 34, 54, 56, 76, 78, 98, 100, 12, 32, 34, 54, 56, 76, 78, 98, 100, 12, 32, 34, 54, 56, 76, 78, 98, 100, 12, 32, 34, 54, 56, 76, 78, 98, 100, 12, 32, 34, 54, 56, 76, 78, 98, 100

Offset

1,2

Links

Table of n, a(n) for n=1..64.

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

Index entries for periodic sequences, period 9.

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

Formula

After 1 step enters a cycle of length 9.

Mathematica

NestList[11 + IntegerReverse[#] &, 1, 99] (* Paolo Xausa, Jun 04 2026 *)

Prog

(PARI) a(n)=if(n>1, 1819553572893220\51^(n%9)%51*2, 1) \\ Charles R Greathouse IV, Jun 03 2026

Crossrefs

Cf. A117828, A117816, A117817.

Sequence in context: A302362 A262239 A074299 * A031118 A335100 A334606

Adjacent sequences: A118525 A118526 A118527 * A118529 A118530 A118531

Keyword

nonn,base,easy

Author

N. J. A. Sloane, May 06 2006

Status

approved