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

1, 2, 33, 129, 1081, 2049, 9233, 33793, 458753, 2015233, 3932161, 33554945, 188743681

Offset: 1

Author

Antti Karttunen, Apr 18 2020

Keywords

• nonn
• more

Comments

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

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

Crossrefs

Cf. A064097, A334090.

Programs

PARI

A064097(n) = if(1==n,0,1+A064097(n-(n/vecmin(factor(n)[,1]))));
m=0; prev=-1; for(n=1,2^26,t=A064097(n); if((t-prev)>m,m=t-prev;print1(n,", ")); prev=t);

Extensions

a(13) from Jinyuan Wang, May 01 2020