OFFSET
1,2
EXAMPLE
The sequence of integer partitions whose Heinz numbers are in the sequence begins: (), (1), (2), (11), (3), (4), (111), (22), (5), (211), (6), (1111), (7), (221), (8), (311), (9), (2111), (33), (222), (411).
MATHEMATICA
Select[Range[100], GCD@@Length/@Split[Sort[FactorInteger[#][[All, 2]]]]==1&]
CROSSREFS
KEYWORD
nonn
AUTHOR
Gus Wiseman, Sep 12 2018
STATUS
approved