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A104947 Primes from merging of 4 successive digits in decimal expansion of the Champernowne Constant. 1
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified September 25 09:26 EDT 2020. Contains 337335 sequences. (Running on oeis4.)