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A015991 Numbers such that ten iterations of Reverse and Add are needed to reach a palindrome. 1

%I #11 May 11 2019 10:24:32

%S 829,928,9059,9149,9239,9329,9419,9509,9599,9689,9779,9869,9959,10634,

%T 10637,10687,10716,10808,10834,10838,10867,10873,10898,10927,10979,

%U 11398,11624,11627,11677,11706,11824,11828,11857,11863,11888

%N Numbers such that ten iterations of Reverse and Add are needed to reach a palindrome.

%C The number of iterations starts at 1, so palindromes (cf. A002113) are not excluded. The corresponding sequence excluding palindromes is A065215.

%H <a href="/index/Res#RAA">Index entries for sequences related to Reverse and Add!</a>

%t tiraQ[n_]:=Rest[Boole[PalindromeQ/@NestList[#+IntegerReverse[#]&,n,10]]]=={0,0,0,0,0,0,0,0,0,1}; Select[Range[12000],tiraQ] (* _Harvey P. Dale_, May 11 2019 *)

%Y Cf. A002113. Different from A065215.

%K nonn,base

%O 1,1

%A _Robert G. Wilson v_

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Last modified April 24 11:01 EDT 2024. Contains 371936 sequences. (Running on oeis4.)