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A304652 Digits of the Copeland-Erdős constant taken in groups of five digits. 0

%I #19 May 26 2018 22:30:06

%S 23571,35711,57111,71113,11131,11317,13171,31719,17192,71923,19232,

%T 92329,23293,32931,29313,93137,31374,13741,37414,74143,41434,14347,

%U 43475,34753,47535,75359,53596,35961,59616,96167,61677,16771,67717,77173,71737,17379,73798,37983,79838,98389

%N Digits of the Copeland-Erdős constant taken in groups of five digits.

%C This sequence is presented by the Foo Bar Challenge, a recruitment tool for Google, as the challenge to renumber some entities with 5-digit ID numbers taken from the first 10004 places of the Copeland-Erdős constant.

%C The ID numbers are to be left zero-padded as needed to ensure they all consist of five digits. Of course here in the OEIS leading zeros will just be dropped.

%C The Foo Bar Challenge statement of the problem says nothing of the fact that there are duplicates among these well before 10000.

%t numCopelandErdos = Flatten[IntegerDigits[Prime[Range[1000]]]]; Table[FromDigits[numCopelandErdos[[n ;; (n + 4)]]], {n, Length[numCopelandErdos] - 4}]

%Y Cf. A033308, A068670.

%K nonn,base

%O 1,1

%A _Alonso del Arte_, May 16 2018

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Last modified March 29 00:26 EDT 2024. Contains 371264 sequences. (Running on oeis4.)