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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A044174 Numbers n such that string 5,1 occurs in the base 7 representation of n but not of n-1. 0

%I

%S 36,85,134,183,232,252,281,330,379,428,477,526,575,595,624,673,722,

%T 771,820,869,918,938,967,1016,1065,1114,1163,1212,1261,1281,1310,1359,

%U 1408,1457,1506,1555,1604,1624,1653,1702,1751,1764

%N Numbers n such that string 5,1 occurs in the base 7 representation of n but not of n-1.

%t SequencePosition[Table[If[SequenceCount[IntegerDigits[n,7],{5,1}]>0,1,0],{n,2000}],{0,1}][[All,2]] (* _Harvey P. Dale_, Mar 03 2019 *)

%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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified January 20 20:50 EST 2021. Contains 340332 sequences. (Running on oeis4.)