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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A262580 Concatenation of the numbers from 1 to n but omitting 10. 0
 1, 12, 123, 1234, 12345, 123456, 1234567, 12345678, 123456789, 12345678911, 1234567891112, 123456789111213, 12345678911121314, 1234567891112131415, 123456789111213141516, 12345678911121314151617, 1234567891112131415161718, 123456789111213141516171819, 12345678911121314151617181920 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS The smallest prime in this sequence is the 61457-digit (probable) prime a(14512) = 123456789111213...14513 found by David Broadhurst on Sep 28 2015. LINKS MATHEMATICA DeleteDuplicates[Table[FromDigits[Flatten[IntegerDigits[Complement[Range[n], {10}]]]], {n, 20}]] (* Robert Price, Nov 05 2018 *) CROSSREFS Cf. A007908, A262299, A262571-A262582. See A262300 for more about this problem. Sequence in context: A007908 A262582 A262581 * A262579 A057932 A262578 Adjacent sequences:  A262577 A262578 A262579 * A262581 A262582 A262583 KEYWORD nonn,base AUTHOR N. J. A. Sloane, Sep 25 2015 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.

Last modified April 6 18:35 EDT 2020. Contains 333286 sequences. (Running on oeis4.)