The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A044250 Numbers n such that string 7,7 occurs in the base 8 representation of n but not of n-1. 1
63, 127, 191, 255, 319, 383, 447, 504, 575, 639, 703, 767, 831, 895, 959, 1016, 1087, 1151, 1215, 1279, 1343, 1407, 1471, 1528, 1599, 1663, 1727, 1791, 1855, 1919, 1983, 2040, 2111, 2175, 2239, 2303, 2367, 2431, 2495, 2552 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
MATHEMATICA
Select[Range[3000], MemberQ[Partition[IntegerDigits[#, 8], 2, 1], {7, 7}] && !MemberQ[Partition[IntegerDigits[#-1, 8], 2, 1], {7, 7}]&] (* Harvey P. Dale, Feb 22 2014 *)
CROSSREFS
Sequence in context: A045064 A043450 A031491 * A044631 A045136 A031895
KEYWORD
nonn,base
AUTHOR
STATUS
approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 30 03:22 EDT 2024. Contains 372957 sequences. (Running on oeis4.)