login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A104950 Primes from merging of 7 successive digits in decimal expansion of the Champernowne Constant. 1
4567891, 1112131, 1213141, 8394041, 4757677, 8798081, 8991001, 1111211, 1112113, 1211311, 1711811, 7118119, 3113213, 3413513, 5146147, 7148149, 9170171, 7417517, 7517617, 8919019, 9119219, 5196197, 7198199, 5206207 (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[300]], 7, 1], PrimeQ], IntegerLength[#] == 7&] (* Vincenzo Librandi, Apr 24 2013 *)

CROSSREFS

Cf. A033307.

Sequence in context: A234793 A227040 A227039 * A234806 A152964 A129931

Adjacent sequences:  A104947 A104948 A104949 * A104951 A104952 A104953

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

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 5 16:53 EDT 2020. Contains 333245 sequences. (Running on oeis4.)