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!)
A334197 Positions of records in A334090; After 1, positions of record jumps upward in A064097. 2

%I

%S 1,2,33,129,1081,2049,9233,33793,458753,2015233,3932161,33554945,

%T 188743681

%N Positions of records in A334090; After 1, positions of record jumps upward in A064097.

%C Terms a(3) .. a(11) are squarefree semiprimes, but 33554945 = 5 * 47 * 142787.

%C Records themselves are: 0, 1, 2, 3, 4, 5, 6, 7, 8, 10, 11, 12, 13.

%o (PARI)

%o A064097(n) = if(1==n,0,1+A064097(n-(n/vecmin(factor(n)[,1]))));

%o m=0; prev=-1; for(n=1,2^26,t=A064097(n); if((t-prev)>m,m=t-prev;print1(n,", ")); prev=t);

%Y Cf. A064097, A334090.

%K nonn,more

%O 1,2

%A _Antti Karttunen_, Apr 18 2020

%E a(13) from _Jinyuan Wang_, May 01 2020

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 24 09:07 EST 2022. Contains 350534 sequences. (Running on oeis4.)