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

1,1

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.

Links

Table of n, a(n) for n=1..40.

Mathematica

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

Crossrefs

Cf. A033308, A068670.

Sequence in context: A227483 A237508 A177827 * A230361 A069334 A118061

Adjacent sequences: A304649 A304650 A304651 * A304653 A304654 A304655

Keyword

nonn,base

Author

Alonso del Arte, May 16 2018

Status

approved