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

23571, 35711, 57111, 71113, 11131, 11317, 13171, 31719, 17192, 71923, 19232, 92329, 23293, 32931, 29313, 93137, 31374, 13741, 37414, 74143, 41434, 14347, 43475, 34753, 47535, 75359, 53596, 35961, 59616, 96167, 61677, 16771, 67717, 77173, 71737, 17379, 73798, 37983, 79838, 98389

Offset: 1

Author

Alonso del Arte, May 16 2018

Keywords

• nonn
• base

Comments

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.

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.

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

Crossrefs

Cf. A033308, A068670.

Programs

Mathematica

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