A033656 - OEIS

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A033656

Trajectory of 21 under map x->x + (x-with-digits-reversed).

0

21, 33, 66, 132, 363, 726, 1353, 4884, 9768, 18447, 92928, 175857, 934428, 1758867, 9447438, 17794887, 96644658, 182289327, 906271608, 1712444217, 8836886388, 17673772776, 85401510447, 159803020905

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OFFSET

0,1

LINKS

Table of n, a(n) for n=0..23.

Index entries for sequences related to Reverse and Add!

FORMULA

a(n) = A033653(n-1), n>1. [From R. J. Mathar, Oct 22 2008]

MATHEMATICA

NestList[#+IntegerReverse[#]&, 21, 30] (* Harvey P. Dale, Dec 16 2021 *)

CROSSREFS

Sequence in context: A354837 A280878 A033901 * A270074 A350099 A032792

Adjacent sequences: A033653 A033654 A033655 * A033657 A033658 A033659

KEYWORD

nonn,base

AUTHOR

N. J. A. Sloane.

STATUS

approved