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!)
A044204 Numbers n such that string 2,1 occurs in the base 8 representation of n but not of n-1. 0

%I #7 Jul 30 2023 10:32:05

%S 17,81,136,145,209,273,337,401,465,529,593,648,657,721,785,849,913,

%T 977,1041,1088,1160,1169,1233,1297,1361,1425,1489,1553,1617,1672,1681,

%U 1745,1809,1873,1937,2001,2065,2129,2184,2193,2257

%N Numbers n such that string 2,1 occurs in the base 8 representation of n but not of n-1.

%t SequencePosition[Table[If[SequenceCount[IntegerDigits[n,8],{2,1}]>0,1,0],{n,2500}],{0,1}][[;;,2]] (* _Harvey P. Dale_, Jul 30 2023 *)

%K nonn,base

%O 1,1

%A _Clark Kimberling_

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 April 22 22:30 EDT 2024. Contains 371906 sequences. (Running on oeis4.)