A104947 Primes from merging of 4 successive digits in decimal expansion of the Champernowne Constant.

4567, 1213, 2131, 8293, 2333, 3343, 3637, 6373, 4243, 5051, 5657, 6263, 6869, 7879, 8081, 9091, 9293, 2939, 9697, 1021, 1031, 1051, 1061, 1091, 2113, 1151, 1511, 1171, 1181, 1811, 1201, 1231, 1291, 1301, 1321, 3313, 3413, 1361, 3613, 1381, 2143, 1451

Offset

1,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

The first 2,800 digits of the Champernowne Constant as calculated at WorldWideSchool.org.

Mathematica

Select[Select[FromDigits/@Partition[Flatten[IntegerDigits/@Range[200]], 4, 1], PrimeQ], IntegerLength[#] == 4&] (* Vincenzo Librandi, Apr 24 2013 *)

Crossrefs

Cf. A033307.

Sequence in context: A102748 A032751 A020436 * A030471 A234677 A252063

Adjacent sequences: A104944 A104945 A104946 * A104948 A104949 A104950

Keyword

nonn,base

Author

Andrew G. West (WestA(AT)wlu.edu), Mar 29 2005

Extensions

Changed offset from 0 to 1 by Vincenzo Librandi, Apr 24 2013

Status

approved