Vincenzo Manto

A397932

Numbers k that are neither squarefree nor powerful such that rad(k)*omega(k) = k, where rad = A007947 and omega = A001221.

Created: 7/23/2026 | Author: Michael De Vlieger , James C. McMahon , and Vincenzo Manto , Jul 15 2026

This sequence has been cited by and influenced 3 other sequences

Official Comments

Composite terms in A397221.
Intersection of A332785 and A397221.
The smallest term in A361098 is a(3189) = 50050 = 2 * 5^2 * 7 * 11 * 13. This is to say that k = 50050 is such that k/rad(k) > A053669(k), k/rad(k) >= A119288(k), and k = rad(k) * omega(k) are all true.

Sequence Chart

Graph of A397932

Data

12,20,28,44,52,68,76,90,92,116,124,126,148,164,172,188,198,212,234,236,244,268,284,292,306,315,316,332,342,356,388,404,412,414,428,436,452,495,508,522,524,548,556,558,585,596,604,628,652,666,668,692,693,716

Cross-References

See also OEIS entries: Cf A001221 A002808 A007947 A332785 A397221 A397933 A397934