A033652 Trajectory of 13 under map x->x + (x-with-digits-reversed).

13, 44, 88, 176, 847, 1595, 7546, 14003, 44044, 88088, 176176, 847847, 1596595, 7553546, 14007103, 44177144, 88354288, 176599676, 853595347, 1597190705, 6668108656, 13236127322, 35608290553, 71117571206

Offset

0,1

Comments

To get the next term, reverse the present term and add it to itself.

Links

Alois P. Heinz, Table of n, a(n) for n = 0..1000

Index entries for sequences related to Reverse and Add!

Formula

a(n+1) = a(n) + {a(n) reversed}.

Example

44 = 13 + 31.

Mathematica

NestList[#+FromDigits[Reverse[IntegerDigits[#]]]&, 13, 30] (* Harvey P. Dale, Mar 04 2015 *)

Crossrefs

Row n=13 of A243238.

Sequence in context: A224102 A123294 A015247 * A026914 A226514 A159742

Adjacent sequences: A033649 A033650 A033651 * A033653 A033654 A033655

Keyword

nonn,base

Author

N. J. A. Sloane

Status

approved