The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A033008 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A033008

Every run of digits of n in base 10 has length 2.
(history; published version)

#11 by Michel Marcus at Wed Feb 05 08:09:26 EST 2014

STATUS

reviewed

approved

#10 by Joerg Arndt at Wed Feb 05 07:08:42 EST 2014

STATUS

proposed

reviewed

#9 by Vincenzo Librandi at Wed Feb 05 04:08:27 EST 2014

STATUS

editing

proposed

#8 by Vincenzo Librandi at Wed Feb 05 04:08:18 EST 2014

LINKS

Vincenzo Librandi, <a href="/A033008/b033008.txt">Table of n, a(n) for n = 1..800</a>

MATHEMATICA

Select[Range[10000], Union[Length/@Split[IntegerDigits[#, 10]]]=={2}&] (* Vincenzo Librandi, Feb 05 2014 *)

STATUS

approved

editing

#7 by M. F. Hasler at Mon Feb 03 13:39:19 EST 2014

STATUS

editing

approved

#6 by M. F. Hasler at Mon Feb 03 13:39:07 EST 2014

COMMENTS

See A043291 and A033001 through A033014 for the analog in other bases. , A033015 ff - A033029 for the variants with run lengths >= 2. - M. F. Hasler, Feb 02 2014

#5 by M. F. Hasler at Sun Feb 02 17:37:43 EST 2014

COMMENTS

See A043291 and A033001 through A033014 for the analog in other bases. A033015 ff for the variants with run lengths >= 2. - M. F. Hasler, Feb 02 2014

FORMULA

a(n) = 11*A043314(n) (= 11*n for n<10). - M. F. Hasler, Feb 02 2014

STATUS

approved

editing

#4 by Russ Cox at Fri Mar 30 18:56:25 EDT 2012

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu)

Clark Kimberling

Discussion

Fri Mar 30

18:56

OEIS Server: https://oeis.org/edit/global/285

#3 by N. J. A. Sloane at Sat Sep 13 03:00:00 EDT 2003

KEYWORD

nonn,base,new

AUTHOR

Clark Kimberling, (ck6(AT)evansville.edu)

#2 by N. J. A. Sloane at Fri May 16 03:00:00 EDT 2003

NAME

Every run of digits of n in base 10 has length 2.

KEYWORD

nonn,base,new

AUTHOR

Clark Kimberling, ck6@cedar.(AT)evansville.edu