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A062841 Palindromes of the form k^3-1. 0

%I #23 Oct 08 2023 15:34:28

%S 0,7,999,999999,258474852,999999999,999999999999,999999999999999,

%T 999999999999999999,999999999999999999999,999999999999999999999999,

%U 999999999999999999999999999,999999999999999999999999999999,999999999999999999999999999999999

%N Palindromes of the form k^3-1.

%C Sequence is infinite as (10^k)^3-1 is a term for all k >= 0. - _Michael S. Branicky_, Mar 27 2021

%e 999 = 10^3-1 and is a palindrome.

%t For[n=0,n<100000000,n++,If[n^3-1==IntegerReverse[n^3-1],Print[n^3-1]]] (* _Dylan Delgado_, Mar 02 2021 *)

%t Select[Range[10^7]^3-1,PalindromeQ] (* The program generates the first ten terms of the sequence. *) (* _Harvey P. Dale_, Oct 08 2023 *)

%o (Python)

%o def afind(limit):

%o for n in range(limit+1):

%o s = str(n**3 - 1)

%o if s == s[::-1]: print(int(s), end=", ")

%o print(afind(10**7)) # _Michael S. Branicky_, Mar 27 2021

%Y Intersection of A002113 and A068601.

%K base,nonn

%O 1,2

%A _Erich Friedman_, Jul 21 2001

%E One more term from _Emeric Deutsch_, Feb 26 2005

%E a(10)-a(14) from _Michael S. Branicky_, Mar 27 2021

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Last modified April 25 08:27 EDT 2024. Contains 371964 sequences. (Running on oeis4.)