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58 'Reverse and Add' steps are needed to reach a palindrome.
9

%I #7 May 05 2018 13:22:10

%S 147996,148896,149796,157986,158886,159786,167976,168876,169776,

%T 177966,178866,179766,187956,188856,189756,190296,191196,192096,

%U 197946,198846,199746,247995,248895,249795,257985,258885,259785,267975,268875,269775

%N 58 'Reverse and Add' steps are needed to reach a palindrome.

%C The number of steps starts at 0, so palindromes (cf. A002113) are excluded. 58 is a record (cf. A065199) of the number of 'Reverse and Add' steps needed to reach a palindrome.

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

%t Select[Range[270000],Position[NestList[#+IntegerReverse[#]&,#,58],_?PalindromeQ] == {{59}}&] (* _Harvey P. Dale_, May 05 2018 *)

%Y A002113, A065198, A065199, A065318.

%K base,nonn

%O 0,1

%A _Klaus Brockhaus_, Oct 30 2001