login
This site is supported by donations to The OEIS Foundation.

 

Logo

Annual Appeal: Please make a donation (tax deductible in USA) to keep the OEIS running. Over 5000 articles have referenced us, often saying "we discovered this result with the help of the OEIS".

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A044082 Numbers n such that string 1,0 occurs in the base 5 representation of n but not of n-1. 0
5, 25, 55, 80, 105, 125, 180, 205, 230, 255, 275, 305, 330, 355, 380, 400, 430, 455, 480, 505, 525, 555, 580, 605, 625, 805, 830, 855, 880, 900, 930, 955, 980, 1005, 1025, 1055, 1080, 1105, 1130, 1150, 1180, 1205, 1230, 1255, 1275 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..45.

MATHEMATICA

Select[Range[1300], MemberQ[Partition[IntegerDigits[#, 5], 2, 1], {1, 0}] && !MemberQ[Partition[IntegerDigits[#-1, 5], 2, 1], {1, 0}]&] (* Harvey P. Dale, May 11 2011 *)

CROSSREFS

Sequence in context: A225494 A139479 A078569 * A161143 A045576 A146649

Adjacent sequences:  A044079 A044080 A044081 * A044083 A044084 A044085

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified December 8 22:51 EST 2016. Contains 278957 sequences.