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

1,2

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.

Links

Table of n, a(n) for n=1..13.

Prog

(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);

Crossrefs

Cf. A064097, A334090.

Sequence in context: A041127 A282726 A097978 * A156369 A263054 A128152

Adjacent sequences: A334194 A334195 A334196 * A334198 A334199 A334200

Keyword

nonn,more

Author

Antti Karttunen, Apr 18 2020

Extensions

a(13) from Jinyuan Wang, May 01 2020

Status

approved