OFFSET
1,1
LINKS
Robert Israel, Table of n, a(n) for n = 1..10000
EXAMPLE
The sequence of terms together with their prime indices begins:
6: {1,2}
10: {1,3}
14: {1,4}
15: {2,3}
18: {1,2,2}
21: {2,4}
22: {1,5}
26: {1,6}
33: {2,5}
34: {1,7}
35: {3,4}
38: {1,8}
39: {2,6}
46: {1,9}
50: {1,3,3}
51: {2,7}
54: {1,2,2,2}
55: {3,5}
57: {2,8}
58: {1,10}
MAPLE
filter:= proc(n) local F;
F:= sort(ifactors(n)[2], (a, b)-> a[1]<b[1]);
nops(F) = 2 and F[1, 2] = 1;
end proc:
select(filter, [$6..200]); # Robert Israel, Apr 14 2019
MATHEMATICA
Select[Range[100], PrimeOmega[#/Power@@FactorInteger[#][[-1]]]==1&]
PROG
(Python)
from sympy import factorint
A325230_list = [n for n, m in ((n, factorint(n)) for n in range(2, 10**6)) if len(m) == 2 and m[min(m)] == 1] # Chai Wah Wu, Apr 16 2019
CROSSREFS
KEYWORD
nonn
AUTHOR
Gus Wiseman, Apr 13 2019
STATUS
approved