OFFSET
1,1
COMMENTS
EXAMPLE
The prime factorization of 1800 is {2,2,2,3,3,5,5}, and the parts of least multiplicity are {3,5}, so 1800 is in the sequence.
The terms together with their prime indices begin:
6: {1,2}
10: {1,3}
14: {1,4}
15: {2,3}
21: {2,4}
22: {1,5}
26: {1,6}
30: {1,2,3}
33: {2,5}
34: {1,7}
35: {3,4}
36: {1,1,2,2}
38: {1,8}
39: {2,6}
42: {1,2,4}
MATHEMATICA
Select[Range[100], Count[Last/@FactorInteger[#], Min@@Last/@FactorInteger[#]]>1&]
CROSSREFS
KEYWORD
nonn
AUTHOR
Gus Wiseman, May 05 2023
STATUS
approved